Null Pointer Dereference
Monthly
NVMe/TCP targets are vulnerable to unauthenticated denial of service when a remote attacker sends a CONNECT command with an invalid CNTLID, triggering a kernel panic on the exposed system. The vulnerability exploits a null pointer dereference that allows any network-accessible attacker to crash the target without authentication. No patch is currently available for this high-severity flaw.
NATS server with leafnode clustering enabled is vulnerable to a denial-of-service crash triggered by remote attackers who exploit null pointer dereference in the compression negotiation handler prior to authentication. Any attacker capable of connecting to a leafnode-configured NATS server can trigger a server panic, causing service disruption. A patch is available to remediate this high-severity vulnerability.
NGINX worker process crashes via null pointer dereference in the mail authentication module when CRAM-MD5 or APOP authentication is configured with retry-enabled backend servers. This denial of service vulnerability affects NGINX Plus and NGINX Open Source with no patch currently available, allowing unauthenticated remote attackers to terminate worker processes and degrade service availability.
A NULL pointer dereference vulnerability exists in the safe_atou64 function within owntone-server (src/misc.c) that allows remote attackers to cause a Denial of Service by sending crafted HTTP requests to the affected server. The vulnerability affects owntone-server through at least commit c4d57aa, and a public proof-of-concept exploit is available on GitHub, indicating active research and potential exploitation risk.
A NULL pointer dereference vulnerability exists in the daap_reply_playlists function within owntone-server's DAAP request handler (src/httpd_daap.c) that allows remote attackers to trigger a denial of service condition by sending a specially crafted DAAP protocol request. The vulnerability affects owntone-server at commit 3d1652d and potentially earlier versions. An attacker can remotely crash the server without authentication by exploiting improper input validation in the playlist reply handler, resulting in service unavailability.
Ella Core is vulnerable to a denial of service attack via a null pointer dereference when processing malformed NGAP LocationReport messages that omit the required UEPresenceInAreaOfInterestList field. An unauthenticated attacker with network access can crash the Ella Core process, disrupting service for all connected subscribers. No patch is currently available.
A NULL pointer dereference vulnerability in free5GC v4.0.1's UDM (Unified Data Management) service allows remote attackers to crash the service via a crafted POST request to the /sdm-subscriptions endpoint containing path traversal sequences and a large JSON payload. The DataChangeNotificationProcedure function in notifier.go fails to validate pointers before dereferencing, causing complete service disruption requiring manual restart. All deployments of free5GC v4.0.1 utilizing UDM HTTP callback functionality are affected, and a patch is available via PR free5gc/udm#78.
The free5GC AUSF authentication service is vulnerable to denial of service through an improper null check in the GetSupiFromSuciSupiMap function, which crashes when processing crafted UE authentication requests that trigger unsafe interface conversion. Remote attackers can exploit this vulnerability to completely disable the AUSF service by sending a specially crafted authentication request containing a nil SuciSupiMap value. A patch is available for affected free5GC v4.0.1 deployments.
A null pointer dereference vulnerability exists in the Linux kernel's RDMA/siw (Software iWARP) module in the TCP receive data path handler. When siw_get_hdr() returns an error before initializing the receive FPDU context, the error handling code attempts to dereference qp->rx_fpdu without null checking, potentially causing a kernel panic and denial of service. The vulnerability affects multiple Linux kernel versions across stable branches (5.10, 5.15, 6.1, 6.6, 6.12, and others) and has been patched across numerous kernel releases.
Arduino-TuyaOpen before version 1.2.1 contains a null pointer dereference vulnerability in its WiFiUDP component that allows unauthenticated attackers on the same local network to trigger a denial-of-service condition by flooding the device with malicious UDP packets. The vulnerability causes memory exhaustion leading to application crashes; while not actively exploited in the wild (KEV status unknown from provided data), the local network attack vector and high availability impact (CVSS 6.5) warrant prompt patching for affected IoT deployments.
iccDEV provides a set of libraries and tools for working with ICC color management profiles. versions up to 2.3.1.5 is affected by null pointer dereference (CVSS 7.8).
Privilege escalation in Windows Performance Counters via null pointer dereference affects Windows Server 2019 and Windows 11 systems, enabling authenticated local attackers to gain elevated privileges. The vulnerability impacts systems where users have standard account access, allowing them to escalate to higher privilege levels on affected machines. No patch is currently available.
Privilege escalation in Windows Ancillary Function Driver for WinSock affects Windows 11 24H2, Windows Server 2022, and Windows Server 2025, allowing authenticated local attackers to gain system-level access through null pointer dereference. The vulnerability requires valid user credentials and local access but no user interaction to exploit. No patch is currently available.
In the Linux kernel, the following vulnerability has been resolved: KVM: Don't clobber irqfd routing type when deassigning irqfd When deassigning a KVM_IRQFD, don't clobber the irqfd's copy of the IRQ's routing entry as doing so breaks kvm_arch_irq_bypass_del_producer() on x86 and arm64, which explicitly look for KVM_IRQ_ROUTING_MSI.
A race condition in the Linux kernel's NVMe target bio completion handler can cause a NULL pointer dereference when a bio is re-submitted while simultaneously being deinitialized, leading to denial of service on systems running affected kernel versions. Local attackers with access to NVMe target functionality can trigger this race to crash the kernel. A patch is not currently available.
Windows Remote Access Connection Manager contains a null pointer dereference flaw affecting Windows 10 (versions 1809 and 21h2) and Windows 11 (version 23h2) that has been confirmed as actively exploited. A local attacker can trigger a denial of service condition without requiring authentication or user interaction. No patch is currently available for this vulnerability.
Windows LDAP service in Server 2022 and 2022 23H2 is vulnerable to denial of service through a null pointer dereference that can be triggered remotely without authentication. An attacker can exploit this flaw over the network to crash the LDAP service and disrupt directory access functionality. No patch is currently available for this vulnerability.
FreeRDP proxy versions prior to 3.22.0 are vulnerable to denial of service when processing specially crafted RDP server responses that trigger a null pointer dereference in the logon information handler. An unauthenticated attacker controlling a malicious RDP server can crash the FreeRDP proxy by sending a LogonInfoV2 PDU with empty domain or username fields. This vulnerability has been patched in version 3.22.0 and later.
Null pointer dereference in TP-Link Tapo C220 v1 and C520WS v2 cameras allows adjacent network attackers to crash the HTTP service via malformed POST requests with excessive Content-Length headers. Attackers can sustain denial of service through repeated crashes despite automatic device restarts. EPSS score is low (0.03%, 10th percentile), indicating minimal observed exploitation activity. No public exploit code or CISA KEV listing identified at time of analysis.
The Linux kernel's NVMe-TCP implementation fails to validate pointer initialization in nvmet_tcp_build_pdu_iovec(), allowing remote attackers to trigger NULL pointer dereferences and cause denial of service by sending H2C_DATA PDUs before completing proper command initialization. An unauthenticated network attacker can exploit this vulnerability to crash the kernel without requiring user interaction or special privileges.
iccDEV versions 2.3.1.1 and below are vulnerable to null pointer dereference in CIccProfileXml::ParseBasic() when processing maliciously crafted ICC color profiles, allowing remote attackers to trigger denial of service or data manipulation without user interaction. Public exploit code exists for this vulnerability, which affects applications using the iccDEV libraries for color profile handling. The vulnerability has been patched in version 2.3.1.2.
Null pointer dereference in iccDEV versions 2.3.1.1 and below allows remote attackers to trigger denial of service or data manipulation via maliciously crafted ICC color profile data, with public exploit code currently available. The vulnerability stems from unsafe handling of user-controllable input in the CIccTagXmlFloatNum<>::ParseXml() function and may enable code execution depending on application context. Upgrade to version 2.3.1.2 to remediate.
iccDEV versions 2.3.1.1 and below contain a null pointer dereference in the CIccXmlArrayType() function that allows remote attackers to trigger denial of service, data manipulation, or potentially achieve code execution through crafted ICC profile data. The vulnerability stems from unsafe handling of user-controlled input in binary structured data and has public exploit code available. Upgrade to version 2.3.1.2 or later to remediate.
A null pointer dereference vulnerability in the Linux kernel's libceph library occurs when free_choose_arg_map() is called after a partial memory allocation failure, allowing a local attacker with low privileges to cause a denial of service. The vulnerability exists because the function does not validate pointers before dereferencing them during cleanup operations. A patch is available to add proper pointer checks and make the cleanup routine resilient to incomplete allocations.
SIPp is vulnerable to a NULL pointer dereference that can be triggered by remote attackers sending malicious SIP messages during active calls, resulting in application crashes and denial of service. Under certain conditions, this vulnerability may also enable arbitrary code execution, potentially compromising system integrity and availability. No patch is currently available.
HarfBuzz::Shaper for Perl versions before 0.032 contain a null pointer dereference in the bundled HarfBuzz library that allows remote attackers to cause a denial of service without authentication or user interaction. The vulnerability affects applications using vulnerable versions of the library and results in service unavailability. No patch is currently available.
Remote denial of service in Windows LSASS affects Windows 10 and 11 through a null pointer dereference that an unauthenticated attacker can trigger over the network. The vulnerability causes service unavailability but does not enable code execution or data theft. No patch is currently available, leaving affected systems vulnerable until Microsoft releases a fix.
In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.
In the Linux kernel through 4.14.13, the rds_cmsg_atomic function in net/rds/rdma.c mishandles cases where page pinning fails or an invalid address is supplied, leading to an rds_atomic_free_op NULL. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.
Denial of service in Samba on Alpine Linux causes the smbd service to crash via a NULL pointer dereference triggered by remote unauthenticated network requests. Alpine Linux has issued a fix in samba 4.23.8-r0, and no public exploit identified at time of analysis. The CVSS 7.5 score reflects high availability impact with a network attack vector requiring no privileges or user interaction.
Null pointer dereference in GNU libredwg 0.13.4's Layer table encoding function allows a local attacker to crash any application built on the library by supplying a DWG file whose LAYER entity has no material handle assigned. The root cause is commit 27118c40 (
Null pointer dereference in GPAC MP4Box up to commit f1219cde causes a local denial-of-service when processing crafted VRML/MPEG-4 scenegraph content via the MP4Box tool. The crash originates in scenegraph/vrml_tools.c, specifically in the cyclic traversal flag logic where a node pointer is dereferenced without a NULL guard. A publicly available proof-of-concept exploit exists, and the patch was merged in release abi-16.23. No public exploitation activity (KEV) has been observed; this is a low-severity, locally-exploitable tool crash with no confidentiality or integrity impact.
NULL pointer dereference in the 5G NR baseband of Samsung Exynos processors and modems causes a denial-of-service condition when a malformed RRC Reconfiguration message is received from the network. Sixteen Exynos chip variants are affected, spanning Samsung flagship, mid-range, and wearable devices - including Exynos 850, 1080, 2100, 2200, 2400, W920, W930, W1000, Modem 5410, and others. An attacker capable of injecting or spoofing RRC layer signaling (e.g., via a rogue base station) can trigger a crash in the L2/RRC processing stack, disrupting cellular connectivity. No public exploit code or active exploitation has been identified at time of analysis.
Null pointer dereference in GPAC's MP4Box scenegraph engine crashes the application when processing malformed MPEG-4 BIFS scene data. The flaw resides in gf_node_list_add_child within base_scenegraph.c, reachable when node registration encounters a zero instance count or a null node pointer in gf_node_unregister() and gf_node_get_name_and_id(). A public proof-of-concept exploit exists and a vendor-released patch (abi-16.23) is available; no active exploitation is recorded in CISA KEV.
Null pointer dereference in GPAC's MP4Box tool crashes the process when parsing crafted MPEG-4/VRML scene graph data containing a malformed MFURL field, triggering the flaw inside gf_sg_mfurl_del() during scene graph cleanup. Local, low-privileged users can cause a denial of service by feeding MP4Box a specially crafted file; there is no confidentiality or integrity impact. A public proof-of-concept is available and the CVSS 4.0 vector confirms Exploit maturity of Proof-of-concept (E:P), making this straightforward for local attackers to reproduce, though impact remains limited to application crash.
Null pointer dereference in Systerel S2OPC through version 1.7.3 enables authenticated remote clients to crash the OPC-UA server by inducing heap allocation failures during subscription publish cycles. The defect in `msg_subscription_publish_bs__alloc_notification_message_items()` silently overwrites a NULL returned by a failed DataChangeNotification allocation with the result of a subsequent EventNotificationList allocation, masking the first failure and causing a deferred NULL dereference that terminates the server process. No public exploit or active exploitation has been identified; a vendor patch is available via GitLab commit 8848f051.
IURegistryFilter.sys, the kernel-mode registry filter driver bundled with IOBit Uninstaller 15.5.0.11, can be crashed by any local low-privileged user by sending a crafted IOCTL to the sub_11838 dispatch handler, which dereferences a null pointer in kernel context and produces a system-wide crash (BSOD). The attack surface is broader than a single product: the advisory explicitly states that the identical IURegistryFilter.sys driver ships across multiple other IObit product families, meaning all such products on an affected host are vectors. A published proof-of-concept exploit exists (CVSS 4.0 E:P), and no vendor patch is available - the vendor did not respond to coordinated disclosure.
Null pointer dereference in mrubyc through 4.0.0 allows an attacker who can supply untrusted .mrb bytecode to crash any application embedding the VM. The op_enter() handler in src/vm.c fails to validate execution context before dereferencing, and OP_ENTER instructions placed at the top level of a crafted bytecode file - where no call frame exists - trigger the dereference and terminate the embedding application. No public exploit or active exploitation has been identified at time of analysis, and real-world risk is bounded by the requirement to feed attacker-controlled bytecode to the target application.
Null pointer dereference in Microsoft Skype for Business Server allows any authenticated low-privilege user to crash the server over the network, causing a complete denial of communications service. Three on-premises product lines are affected: Server 2015 CU13, Server 2019 CU8, and Subscription Edition CU1. No active exploitation is confirmed - SSVC rates exploitation as none and the attack is not automatable - but the low authentication bar (any valid SfB user account) makes this a credible insider threat or compromised-credential scenario.
Null pointer dereference in Windows Routing and Remote Access Service (RRAS) enables a network-authenticated attacker with low privileges to crash the service and cause denial of service across all major Windows and Windows Server releases. The vulnerability is triggered over the network without user interaction, making it suitable for disrupting VPN, dial-up, or routing services that rely on RRAS. No public exploit or active exploitation has been identified at time of analysis; a vendor-released patch is available.
Null pointer dereference in Windows Schannel - Microsoft's native TLS/SSL security package - allows an authenticated network attacker to crash the affected service on Windows Server 2022, Windows Server 2025, and Windows 11 versions 23H2 through 26H1. The CVSS vector (AV:N/AC:H/PR:L) places this as a moderate-severity denial-of-service requiring valid credentials and non-trivial triggering conditions, with no confidentiality or integrity impact. No public exploit code or active exploitation has been identified at time of analysis.
Null pointer dereference in Windows Active Directory Domain Services (AD DS) enables a low-privileged, authenticated network attacker to crash the service and deny domain authentication. The flaw affects a broad range of Windows Server versions from Windows Server 2012 through Windows Server 2025 as well as Windows 10 and Windows 11 client platforms configured with the AD DS role. Microsoft has issued patches; no public exploit code or CISA KEV listing has been identified at time of analysis.
Authenticated denial of service in Fortinet FortiOS, FortiPAM, and FortiProxy allows a high-privileged network attacker to crash the httpsd daemon by sending specially crafted HTTP requests, exploiting a NULL pointer dereference (CWE-476). The vulnerability spans FortiOS 7.2.x and 7.4.x, FortiProxy 7.2 through 7.6.6, and every FortiPAM release from 1.0.0 through 1.9.0. No active in-the-wild exploitation is confirmed, but the CVSS temporal metric E:P indicates proof-of-concept code exists; Fortinet has released an official fix under advisory FG-IR-26-173.
NULL-pointer dereference in code handling Authentication and Key Agreement (AKA) Synchronization-Failure messages causes a process crash when a malformed or unexpected AKA-Synchronization-Failure response is processed. The vulnerability affects software that implements 3GPP AKA authentication - a protocol used in mobile network authentication (3G/4G/5G) and EAP-AKA for Wi-Fi/IMS - as packaged by Ubuntu. No public exploit or CISA KEV listing has been identified at time of analysis, and the primary real-world impact is denial of service via crash of the authentication handling daemon.
Denial of service in IBM i 7.3 through 7.6 is achievable by any remote authenticated low-privilege user via a NULL pointer dereference, causing complete availability loss with no data exposure. The CVSS vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) confirms low-complexity network exploitation requiring only a valid user account and no user interaction. No public exploit code and no CISA KEV listing have been identified at time of analysis; IBM has released a patch via its support portal.
Denial of service in Hitachi Energy RTU500 Series CMU firmware allows an unauthenticated remote attacker to crash the IEC 60870-5-104 communication process by flooding the device with General Interrogation (GI) requests at short intervals. The high-load condition triggers a NULL pointer dereference in the last entry of the enhanced message queue, causing a BCI_IEC104 fatal write error, connection interruption, and automatic restart - severing bidirectional telecontrol communication. No public exploit code has been identified at time of analysis, and exploitation requires the ability to sustain elevated request rates against a reachable IEC 104 endpoint.
NULL pointer dereference in Samsung mTower's TEE kernel allows a Non-Secure caller to crash the secure world by supplying an invalid, zero, or stale session ID to the ioctl invoke path. The flaw exists in tee_ioctl_invoke() (entry_std.c) and tee_ta_invoke_command() (tee_ta_manager.c), where find_session() returns NULL without a guard before dereferencing sess->ctx, causing a secure-world fault. All mTower versions prior to commit afef59aa6f55c5d5ebf9b14bc020bf1c2c37489a are affected; no public exploit has been identified at time of analysis.
Null pointer dereference in FLVMeta up to 1.2.2 causes a process crash when parsing a malformed AMF object from a crafted FLV file, resulting in denial of service. The flaw resides in `amf_object_get` (and the parallel `amf_object_set`) in `src/amf.c`, where a chained double dereference `node->next->next` executes without first confirming `node->next` is non-NULL. A public SEGV proof-of-concept exists, though the project maintainer disputes the security relevance, stating no exploitation path beyond a crash has been demonstrated. No CISA KEV listing; no public exploit identified at time of analysis beyond the crash reproducer.
Null pointer dereference in armink struct2json 1.0 allows remote attackers to crash any application that deserializes attacker-controlled JSON through the library's `S2J_STRUCT_GET_string_ELEMENT` function. The root cause is an absence of null validation on the `valuestring` field during JSON deserialization in `struct2json/inc/s2jdef.h`, yielding a remotely triggerable denial-of-service. A public proof-of-concept exploit has been disclosed on GitHub; no vendor patch has been issued and the vendor did not respond to responsible disclosure.
NULL pointer dereference in TP-Link TL-WR841N v14's UPnP service allows adjacent-network attackers to crash the UPnP process by sending a specially crafted SOAP state variable query, resulting in a denial-of-service condition. The affected UPnP functionality - including device discovery and state management - remains unavailable until the process is restarted or the device is rebooted. No public exploit code has been identified at time of analysis, and this vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.
NULL pointer dereference in the UPnP SOAP request handler of the TP-Link TL-WR841N v14 allows an adjacent-network attacker to crash the UPnP daemon by sending a crafted SOAP action request with unexpected XML content, producing a denial-of-service condition until the service is restarted or the device rebooted. Impact is confined to UPnP functionality; the router itself continues operating. No public exploit identified at time of analysis, and this CVE is not listed in the CISA KEV catalog. TP-Link has released a firmware patch addressing this flaw.
Null pointer dereference in PLANET GS-4210-16P2S managed switch firmware before 3.441b260626 allows remote authenticated attackers to crash the web management interface by sending a crafted request. The web_poe_alive_rmtip_post handler in /cgi-bin/dispatcher.cgi dereferences the rmtIP POST parameter without first validating its presence, meaning a missing parameter is dereferenced as NULL, faulting the CGI process and rendering the web management interface unavailable. No active exploitation (CISA KEV) or public proof-of-concept has been identified at time of analysis, though the trigger is trivially simple - a single omitted parameter - for any attacker already holding administrative credentials.
NULL pointer dereference in Wazuh agent enrollment (versions 4.0.0-4.14.6) allows a network-positioned attacker operating a rogue manager or performing a man-in-the-middle attack to deterministically crash the agent process by supplying a malformed key response containing fewer than four space-separated fields. The flaw resides in `w_enrollment_process_agent_key()` in `src/shared/enrollment_op.c`, which passes unvalidated NULL entries from `OS_StrBreak()` directly into `OS_IsValidName()`, where an unguarded `strlen()` call on a NULL pointer terminates the agent. The attack is constrained by high complexity conditions (no CA certificate configured, or active MITM capability), and no public exploit code or CISA KEV listing has been identified at time of analysis. The issue is fixed in Wazuh 4.14.7.
Null pointer dereference in iOS and iPadOS allows a locally installed app to trigger unexpected system termination (device crash/reboot) by supplying crafted input that bypasses input validation. Affected versions span the legacy 18.x branch (prior to 18.7.9) and the current 26.x branch (prior to 26.5), covering a broad swath of Apple mobile devices. No active exploitation has been identified - CISA KEV status is absent, SSVC rates exploitation as none, and EPSS sits at the 1st percentile - placing this squarely as a patch-cycle priority rather than an emergency response item.
Substance3D - Designer crashes on availability when a victim opens a specially crafted malicious file, triggering a NULL Pointer Dereference that terminates the application. Adobe Substance 3D Designer users across all tracked versions (CPE wildcard) are affected, with impact limited to application-level denial of service - no code execution, data disclosure, or integrity compromise is possible. No public exploit code exists and this vulnerability is not listed in the CISA KEV catalog, consistent with its low exploitability ceiling (requires local victim interaction).
NULL pointer dereference in the Zephyr RTOS OCPP 1.6 client allows a malicious or compromised OCPP central system - or a man-in-the-middle on an unencrypted ws:// connection - to remotely crash the OCPP reader thread of an EV charge point by returning a malformed CALLRESULT uid field. Impact is availability-only and platform-conditional: on MMU/MPU-equipped or CONFIG_NULL_POINTER_EXCEPTION_DETECTION-enabled Zephyr targets, the fault invokes the fatal handler and produces a remote denial of service; on bare-metal targets where address 0 is readable, the call returns 0 and is benign. No public exploit is identified at time of analysis, and the vendor-supplied patch at the referenced commits is known to be incomplete - a second unguarded strtok_r/atoi pair in the same function path remains exploitable via a uid containing one token but no second hyphen-delimited segment.
Zephyr RTOS's Hearing Access Service (HAS) GATT peripheral crashes when a previously bonded Bluetooth peer reconnects during a boot-time race window before bt_has_register() completes service initialization. The security_changed() callback - registered unconditionally via BT_CONN_CB_DEFINE - fires against NULL attribute pointers, triggering either a kernel assertion or a NULL dereference in bt_gatt_is_subscribed(). With CVSS AV:A/AC:H and confirmed DoS-only impact, this represents a medium-severity availability risk against embedded hearing-aid devices running Zephyr 3.6.0 through 4.4.1; no public exploit code has been identified, and a vendor patch is confirmed at 4.4.2.
Null pointer dereference in DrayTek VigorSwitch's formlogout web management function allows authenticated remote administrators to crash the management service, causing a denial of service across 28+ switch models spanning the G, P, Q, FX, and PX product lines. The flaw stems from absent validation of an empty or missing Cookie header before string handling in the formlogout handler, and is patched in firmware versions released under DrayTek's August 2026 security advisory. No public exploit code or CISA KEV listing is referenced in the available data.
Null pointer dereference in llama.cpp's ggml-RPC server (commit bec4772f6) allows remote unauthenticated denial of service against any deployment exposing the RPC port to the network. The flaw resides in rpc_server::graph_compute, where a graph node with id=0 bypasses a conditional null check, enabling a single crafted TCP packet to crash the server process. No standalone exploit code is publicly available at time of analysis, though the upstream fix PR includes a Python test script that reproducibly triggers the crash in under one second.
NULL pointer dereference in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 allows a local low-privileged attacker to crash the system, causing a denial of service. Exploitation requires high attack complexity, suggesting a race condition or specific system state must be induced. No public exploit code exists and this vulnerability is not listed in the CISA KEV catalog; a vendor patch is available via IBM support.
Denial of service in FreeIPA's ipa-enrollment SLAPI plugin allows any authenticated LDAP client to crash the 389 Directory Server by sending a malformed extended operation. The flaw (CWE-476, null pointer dereference) is triggered by omitting the request value for the JOIN_OID in the ipa-enrollment extended operation, causing the server to dereference a null pointer and crash. No public exploit or active exploitation has been identified at time of analysis; however, the low attack complexity and network-accessible vector make this a credible threat against any RHEL Identity Management deployment.
Wireshark's Bluetooth BR/EDR FHS protocol dissector crashes via a NULL pointer dereference (CWE-476) when processing a malformed packet capture, affecting the 4.6.x branch (4.6.0-4.6.7) and the 4.4.x branch (4.4.0-4.4.18). An attacker who can persuade a user to open a specially crafted capture file can crash the Wireshark process, resulting in an application-level denial of service with no confidentiality or integrity impact. No public exploit code has been identified and this CVE does not appear in the CISA KEV catalog; EPSS data was not included in the available intelligence.
Wireshark's CMS protocol dissector crashes via a null pointer dereference (CWE-476) in versions 4.6.0 through 4.6.7 and 4.4.0 through 4.4.17, allowing denial of service against the application. An attacker can cause Wireshark to crash by inducing a user to open a malformed capture file or by injecting crafted CMS protocol traffic into a live capture session. No public exploit has been identified at time of analysis, and the CVSS local attack vector combined with high complexity limits realistic exposure to targeted scenarios.
Denial of service in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 is achievable by an adjacent-network attacker exploiting a null pointer dereference, capable of crashing the targeted system without requiring authentication or user interaction. The vulnerability affects IBM's enterprise UNIX operating system and its PowerVM Virtual I/O Server layer, where availability is operationally critical for hosted workloads. No public exploit code has been identified at time of analysis, and IBM has released a remediation patch via official advisory.
Denial of service in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 is achievable by an adjacent-network attacker through a NULL pointer dereference in a network-handling code path. Exploitation requires no authentication but demands high attack complexity, substantially limiting opportunistic or internet-scale attacks. IBM has released a patch via its official support portal; no public exploit code or CISA KEV listing has been identified at time of analysis.
Process-terminating denial of service in Wekan's export API (versions prior to 10.38) allows an attacker to crash the entire server with a single crafted GET request. Four export handlers in models/export.js and models/exportExcel.js called user._id.toString() on the undefined result of ReactiveCache.getUser() without a null guard; supplying an invalid authToken query parameter to any export endpoint triggers a TypeError that propagates as an unhandled async rejection and terminates the Meteor/Node.js process, denying service to all concurrent users. No public exploit code has been identified at time of analysis and this CVE does not appear in the CISA KEV catalog, though the attack path is trivially reproducible given the explicit description and public commit diff.
The AdvertiseListenerImpl component in mod_cluster's core multicast UDP handler can be permanently crashed by a single crafted datagram, affecting Red Hat JBoss Enterprise Application Platform 7 and 8, JBoss Web Server 5 through 7, and Red Hat Single Sign-On 7. An unauthenticated attacker with adjacency to the mod_cluster multicast group can silently terminate the advertise listener thread, causing the affected node to stop receiving cluster topology updates until manually restarted - with no runtime indication of failure since isListening() continues returning true. No public exploit is identified at time of analysis, and this CVE is not listed in the CISA KEV catalog based on available data.
BusyBox wget's FEATURE_WGET_TIMEOUT handler in networking/wget.c crashes with a null pointer dereference when the -T (timeout) argument is processed, affecting versions 1.30.0 and 1.30.1. Local users who can invoke BusyBox wget can trigger a denial-of-service crash of the wget process by supplying a crafted -T argument value, exploiting an unguarded pointer dereference in the shared getopt32 option-parsing library. No public exploit has confirmed active production exploitation, but a public proof-of-concept is available and the CVE is not listed in CISA KEV.
NULL-pointer dereference in kin-openapi's request validation pipeline (versions 0.2.0 through 0.143.0) enables any unauthenticated remote client to crash request validation with a single crafted HTTP request. The defect resides in defaultContentParameterDecoder within openapi3filter/req_resp_decoder.go, where mt.Schema.Value is dereferenced without a nil guard when a content parameter's application/json media type declares no schema - a construct that is explicitly valid under both OpenAPI 3.0.x and 3.1.x, meaning doc.Validate() will not surface the issue at startup. Depending on integration depth, an attacker can cause either unbounded panic-log growth or a complete process crash; no public exploit or CISA KEV listing exists at time of analysis, and the vendor released a confirmed fix in v0.144.0.
Denial-of-service in TOTOLINK EX1200L firmware 9.3.5u.6146_B20201023 allows authenticated remote attackers to crash the device by sending a crafted request to the setWizardCfg function in /cgi-bin/cstecgi.cgi, triggering a null pointer dereference. Impact is limited strictly to availability - no confidentiality or integrity compromise - but a publicly available proof-of-concept exploit on GitHub (CVSS 4.0 E:P) significantly lowers the exploitation barrier. No vendor patch has been identified and the device is not listed in CISA KEV, making access restriction to the management interface the primary mitigation.
Remote denial-of-service in TOTOLINK EX1200L firmware 9.3.5u.6146_B20201023 allows a low-privileged authenticated attacker to crash the device by submitting a malformed request to the setPasswordCfg function in the CGI-based web management interface. Exploitation triggers a null pointer dereference in /cgi-bin/cstecgi.cgi, rendering the device unresponsive and disrupting its network extension services entirely. A public proof-of-concept exploit exists on GitHub, lowering the bar for exploitation, though no active exploitation has been recorded in CISA KEV at time of analysis.
Null pointer dereference in HarmonyOS 6.1.0's image codec module allows a local, unprivileged process to crash the codec and degrade device availability. Huawei disclosed this via their August 2026 security bulletins covering consumer devices, vision products, wearables, and laptops running HarmonyOS. No active exploitation has been identified (SSVC: Exploitation none), and the impact is bounded to partial availability loss with no confidentiality or integrity exposure.
Null pointer dereference in the HarmonyOS image codec module causes a local denial-of-service condition, degrading availability of affected devices running HarmonyOS 6.1.0. The flaw is triggered locally without requiring elevated privileges, and successful exploitation crashes or hangs the image codec process. No active exploitation has been identified; no public exploit code is known at time of analysis.
Null dereference in the load-balancing subsystem of Absolute Secure Access servers (prior to 14.57) allows unauthenticated remote attackers to crash the internal load balancer process by sending a single crafted packet. Exploitation is constrained to deployments with load balancing enabled; critically, the Secure Access server itself remains operational after the attack, continues to accept client connections, and retains the ability to failover - limiting real-world impact to partial load-distribution disruption rather than full service outage. No public exploit code has been identified and no confirmed active exploitation is recorded at time of analysis.
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Fix NULL dereference in ffa_partition_info_get() ffa_partition_info_get() passes uuid_str directly to uuid_parse() without a NULL check. When a caller passes NULL, uuid_parse() -> __uuid_parse() -> uuid_is_valid() dereferences the pointer, causing a kernel panic: | Unable to handle kernel NULL pointer dereference at virtual address | 0000000000000040 | pc : uuid_parse+0x40/0xac | lr : ffa_partition_info_get+0x1c/0x94 [arm_ffa] Add a NULL guard before uuid_parse() so a NULL argument returns -ENODEV instead of crashing. Callers are expected to always supply a valid partition UUID, so NULL is not a supported input.
In the Linux kernel, the following vulnerability has been resolved: net/sched: Handle TC_ACT_REDIRECT from qdisc filter chains When a TC filter attached to a qdisc filter chain returns TC_ACT_REDIRECT (ex: via an eBPF program calling bpf_redirect() or an act_bpf action), the redirect was silently lost i.e no qdisc classify function handled TC_ACT_REDIRECT, so the packet fell through the switch and was enqueued normally instead of being redirected. This has been broken since bpf_redirect() was introduced for TC in commit 27b29f63058d ("bpf: add bpf_redirect() helper"). We got lucky for a long time because bpf_net_context was a per-CPU variable that was always available. commit 401cb7dae813 ("net: Reference bpf_redirect_info via task_struct on PREEMPT_RT.") turned bpf_net_context into a task_struct member that is only set up by explicit callers. Without a caller setting it up, bpf_redirect() itself crashes with a NULL pointer dereference in bpf_net_ctx_get_ri(). However, even with bpf_net_context available, TC_ACT_REDIRECT from qdisc filter chains cannot be honored without adding skb_do_redirect() calls to every qdisc classify function, which would require changes across net/sched/. Isolate it to ebpf core where it belongs. Instead, add a tcf_classify_qdisc() inline helper in pkt_cls.h, as a wrapper around tcf_classify() for use by qdisc classify functions and tcf_qevent_handle(). When the classify verdict is TC_ACT_REDIRECT, the wrapper converts it to TC_ACT_SHOT, dropping the packet rather than letting it continue silently. Dropping is preferred over letting the packet through because the user immediately sees packet loss. Silently passing the packet through would hide the problem and leave the user wondering why their redirect is not working. The clsact fast path, tc_run() continues to call tcf_classify() directly and is unaffected: TC_ACT_REDIRECT is returned as-is and handled by sch_handle_egress/ingress() calling skb_do_redirect() as before.
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7925: fix possible NULL-pointer deref in mt7925_mcu_bss_he_tlv() mt76_connac_get_he_phy_cap routine can theoretically return NULL so check cap pointer before dereferencing it.
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: use kvzalloc to allocate struct dc struct dc has grown large over time (most of it the two inlined dc_scratch_space copies) and now sits close to the page allocator's 4 MiB contiguous allocation limit. Its actual size is not fixed by the source alone, it also depends on the compiler and the .config, so it can easily cross 4 MiB, e.g. with a newer GCC or a config change. dc_create() allocates it with kzalloc(). Once struct dc exceeds 4 MiB the request is rounded up to order 11 (8 MiB), which is above MAX_PAGE_ORDER, so the page allocator warns and returns NULL. dc_create() then fails, DM init fails and amdgpu probe aborts with -EINVAL: WARNING: mm/page_alloc.c:5197 at __alloc_frozen_pages_noprof+0x2f9/0x380 dc_create+0x38/0x660 [amdgpu] amdgpu_dm_init+0x2d9/0x510 [amdgpu] dm_hw_init+0x1b/0x90 [amdgpu] amdgpu_device_init.cold+0x150d/0x1e13 [amdgpu] amdgpu_driver_load_kms+0x19/0x80 [amdgpu] amdgpu_pci_probe+0x1e2/0x4c0 [amdgpu] dc_create() then returns NULL and DM init fails, which aborts the whole GPU init and makes amdgpu probe fail with -EINVAL ("hw_init of IP block <dm> failed -22"), leaving the display unusable. The subsequent amdgpu_irq_put() warnings during teardown are just fallout of unwinding a half-initialized device. struct dc is a software-only bookkeeping structure that is never handed to hardware DMA and is only ever kept as an opaque pointer, so it does not require physically contiguous memory. Allocate it with kvzalloc() (and free it with kvfree()) so that the allocator can fall back to vmalloc() when a contiguous allocation of that size is not available, which also avoids the MAX_PAGE_ORDER warning entirely. v2: - Rebase to amd-staging-drm-next. (cherry picked from commit 991e0516a8072f2292681c6ae98a924ab0e32575)
In the Linux kernel, the following vulnerability has been resolved: serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms Commit b1b4efea05a5 ("serial: 8250_mid: Disable DMA for selected platforms") replaced the dnv_board setup and exit callbacks with PTR_IF(false, ...), which evaluates to NULL. However, the three call sites in mid8250_probe() and mid8250_remove() unconditionally dereference these function pointers without NULL checks, causing a NULL pointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), or Snowridge (SNR) platform. Fix this by adding the missing NULL checks before calling the setup and exit callbacks.
In the Linux kernel, the following vulnerability has been resolved: drm/dp_mst: Handle torn-down topology gracefully in drm_dp_mst_topology_queue_probe() A hotplug or link-loss event can tear down the MST topology (setting mgr->mst_state = false and mgr->mst_primary = NULL) concurrently with a caller invoking drm_dp_mst_topology_queue_probe(). Since the check is already performed under mgr->lock, the condition is not a programming error but a valid race -- the topology was valid when the caller decided to call this function, but was torn down before the lock was acquired. Replace the drm_WARN_ON() with a graceful early return. This eliminates spurious kernel warnings and the resulting compositor crashes observed when connecting/disconnecting DP MST monitors, while keeping the correct behavior of doing nothing when MST is not active. A drm_dbg_mst() trace is added so the skipped probe remains observable under MST debug logging. The existing WARN_ON(mgr->mst_primary) in drm_dp_mst_topology_mgr_set_mst() already catches the case where the topology is initialized twice, so no diagnostic coverage is lost.
MongoDB Server's query planner contains a null pointer dereference (CWE-476) that enables any authenticated user holding read-level privileges to crash the server process by submitting a specially crafted query against a collection with a text index. Affected branches span MongoDB 7.0.x, 8.0.x, and 8.3.x, with fixed releases available in 7.0.40, 8.0.29, and 8.3.8 respectively. No public exploit or active exploitation is identified; SSVC rates exploitation as none and the attack is not automatable, though the availability impact is total for the targeted server instance.
Remote Registry Service denial of service in Microsoft Windows allows network-authenticated attackers to crash the service via a crafted RPC request triggering a null pointer dereference. The CVSS vector (AV:N/AC:L/PR:L/UI:N) confirms that any domain or local account with network access to the service is sufficient for exploitation - no elevated privileges required. No public exploit code has been identified and this vulnerability is not listed in CISA KEV at time of analysis.
Null pointer dereference in the Windows Remote Registry Service enables an authenticated network attacker to crash the service, resulting in denial of availability for remote registry operations across a broad range of Microsoft platforms. Affected builds span Windows 10/11 consumer releases and Windows Server 2012 through Server 2025, representing the near-entirety of Microsoft's currently supported Windows footprint. No public exploit identified at time of analysis, and CISA's SSVC framework rates exploitation as 'none' with partial technical impact, positioning this as a standard patch-cycle priority rather than an out-of-band emergency.
Denial of service in Velociraptor allows any authenticated user - including those holding only the read-only reader role - to immediately terminate the entire server process with a single API call. By invoking SetPassword with a username that does not exist, an attacker triggers a null pointer dereference (CWE-476) that crashes the process, rendering the DFIR platform completely unavailable. No public exploit has been identified at time of analysis, but the trivially low exploitation barrier - any valid credential suffices - makes this a credible insider or compromised-account threat in any environment where Velociraptor is operationally depended upon.
NULL pointer dereference in Zephyr RTOS's experimental device_next USB DFU class crashes any device where DFU download is enabled when a USB host sends a zero-length DFU_DNLOAD terminator after initiating a valid transfer. The result is a fatal CPU fault causing device crash or reset - impact is strictly limited to availability, with the vendor and commit diff explicitly confirming no memory corruption or information disclosure. No public exploit has been identified at time of analysis, and exploitation requires physical control of the attached USB host.
NULL pointer dereference in the shim application's dp.c library exposes Red Hat Enterprise Linux 7, 8, and 9 systems using UEFI Secure Boot to a local denial-of-service condition. An attacker with high local privileges and the ability to interact with the shim boot path can trigger the missing NULL pointer check, potentially disrupting the boot process. No public exploit code has been identified at time of analysis, and the low CVSS score of 3.9 reflects the constrained attack prerequisites, though the changed scope (S:C) signals that the impact crosses from the shim component into the broader boot environment.
Null pointer dereference in OP-TEE OS through version 4.10.0 allows a low-privileged Normal World process to crash the entire Trusted Execution Environment by opening a session directly on the Widevine pseudo-TA when CFG_WIDEVINE_PTA is enabled. The open_session handler in core/pta/widevine.c calls is_user_ta_ctx(session->ctx) without first checking that session is non-NULL, faulting the TEE at S-EL1 and making all TEE services - including secure key storage and other Trusted Applications - unavailable until reboot. No public exploit code exists and no CISA KEV listing is present; the upstream fix is confirmed by commit 0aadfc2 and the CVSS 4.0 score of 5.7 reflects the local, low-privilege, configuration-dependent exploitation conditions.
Authenticated denial of service in HashiCorp Consul Community Edition and Consul Enterprise 1.18.0-2.0.2 allows a network attacker holding config-entry write permission to crash the Consul server agent by submitting a crafted service-router configuration entry. The flaw is rooted in a null pointer dereference (CWE-476) triggered along the Enterprise-to-Community Edition downgrade code path, meaning only deployments undergoing or having undergone that transition are exploitable. No public exploit code or active exploitation confirmed by CISA KEV has been identified; vendor-released patches are available and confirmed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
Kernel null pointer dereference in Imagination Technologies Graphics DDK allows a local non-privileged user to crash the host system via crafted GPU system calls. Multiple release branches are affected, including DDK 26.1 RTM1, 25.1-25.3 RTM, 24.2 RTM2, 23.2 RTM2, and 1.18 RTM2. An attacker with a local shell account on a device running the affected kernel driver can trigger platform instability or a full denial of service - no exploit has been publicly identified at time of analysis, and EPSS probability is extremely low at 0.15% (5th percentile).
Null pointer dereference in the llama.cpp LLaMA-Android JNI wrapper's bench_1model() function allows denial of service via a crafted model file. Builds b1886 through b7445 (packaged releases 0.9.0-0.17.1) are affected; the function skips null validation on the model context pointer before dereferencing it, so supplying a malformed or truncated GGUF model file triggers a SIGSEGV that terminates the Android application process. No public exploit has been identified at time of analysis and this is not listed in CISA KEV, but the attack path is mechanically simple for anyone able to deliver a crafted model to the device.
NVMe/TCP targets are vulnerable to unauthenticated denial of service when a remote attacker sends a CONNECT command with an invalid CNTLID, triggering a kernel panic on the exposed system. The vulnerability exploits a null pointer dereference that allows any network-accessible attacker to crash the target without authentication. No patch is currently available for this high-severity flaw.
NATS server with leafnode clustering enabled is vulnerable to a denial-of-service crash triggered by remote attackers who exploit null pointer dereference in the compression negotiation handler prior to authentication. Any attacker capable of connecting to a leafnode-configured NATS server can trigger a server panic, causing service disruption. A patch is available to remediate this high-severity vulnerability.
NGINX worker process crashes via null pointer dereference in the mail authentication module when CRAM-MD5 or APOP authentication is configured with retry-enabled backend servers. This denial of service vulnerability affects NGINX Plus and NGINX Open Source with no patch currently available, allowing unauthenticated remote attackers to terminate worker processes and degrade service availability.
A NULL pointer dereference vulnerability exists in the safe_atou64 function within owntone-server (src/misc.c) that allows remote attackers to cause a Denial of Service by sending crafted HTTP requests to the affected server. The vulnerability affects owntone-server through at least commit c4d57aa, and a public proof-of-concept exploit is available on GitHub, indicating active research and potential exploitation risk.
A NULL pointer dereference vulnerability exists in the daap_reply_playlists function within owntone-server's DAAP request handler (src/httpd_daap.c) that allows remote attackers to trigger a denial of service condition by sending a specially crafted DAAP protocol request. The vulnerability affects owntone-server at commit 3d1652d and potentially earlier versions. An attacker can remotely crash the server without authentication by exploiting improper input validation in the playlist reply handler, resulting in service unavailability.
Ella Core is vulnerable to a denial of service attack via a null pointer dereference when processing malformed NGAP LocationReport messages that omit the required UEPresenceInAreaOfInterestList field. An unauthenticated attacker with network access can crash the Ella Core process, disrupting service for all connected subscribers. No patch is currently available.
A NULL pointer dereference vulnerability in free5GC v4.0.1's UDM (Unified Data Management) service allows remote attackers to crash the service via a crafted POST request to the /sdm-subscriptions endpoint containing path traversal sequences and a large JSON payload. The DataChangeNotificationProcedure function in notifier.go fails to validate pointers before dereferencing, causing complete service disruption requiring manual restart. All deployments of free5GC v4.0.1 utilizing UDM HTTP callback functionality are affected, and a patch is available via PR free5gc/udm#78.
The free5GC AUSF authentication service is vulnerable to denial of service through an improper null check in the GetSupiFromSuciSupiMap function, which crashes when processing crafted UE authentication requests that trigger unsafe interface conversion. Remote attackers can exploit this vulnerability to completely disable the AUSF service by sending a specially crafted authentication request containing a nil SuciSupiMap value. A patch is available for affected free5GC v4.0.1 deployments.
A null pointer dereference vulnerability exists in the Linux kernel's RDMA/siw (Software iWARP) module in the TCP receive data path handler. When siw_get_hdr() returns an error before initializing the receive FPDU context, the error handling code attempts to dereference qp->rx_fpdu without null checking, potentially causing a kernel panic and denial of service. The vulnerability affects multiple Linux kernel versions across stable branches (5.10, 5.15, 6.1, 6.6, 6.12, and others) and has been patched across numerous kernel releases.
Arduino-TuyaOpen before version 1.2.1 contains a null pointer dereference vulnerability in its WiFiUDP component that allows unauthenticated attackers on the same local network to trigger a denial-of-service condition by flooding the device with malicious UDP packets. The vulnerability causes memory exhaustion leading to application crashes; while not actively exploited in the wild (KEV status unknown from provided data), the local network attack vector and high availability impact (CVSS 6.5) warrant prompt patching for affected IoT deployments.
iccDEV provides a set of libraries and tools for working with ICC color management profiles. versions up to 2.3.1.5 is affected by null pointer dereference (CVSS 7.8).
Privilege escalation in Windows Performance Counters via null pointer dereference affects Windows Server 2019 and Windows 11 systems, enabling authenticated local attackers to gain elevated privileges. The vulnerability impacts systems where users have standard account access, allowing them to escalate to higher privilege levels on affected machines. No patch is currently available.
Privilege escalation in Windows Ancillary Function Driver for WinSock affects Windows 11 24H2, Windows Server 2022, and Windows Server 2025, allowing authenticated local attackers to gain system-level access through null pointer dereference. The vulnerability requires valid user credentials and local access but no user interaction to exploit. No patch is currently available.
In the Linux kernel, the following vulnerability has been resolved: KVM: Don't clobber irqfd routing type when deassigning irqfd When deassigning a KVM_IRQFD, don't clobber the irqfd's copy of the IRQ's routing entry as doing so breaks kvm_arch_irq_bypass_del_producer() on x86 and arm64, which explicitly look for KVM_IRQ_ROUTING_MSI.
A race condition in the Linux kernel's NVMe target bio completion handler can cause a NULL pointer dereference when a bio is re-submitted while simultaneously being deinitialized, leading to denial of service on systems running affected kernel versions. Local attackers with access to NVMe target functionality can trigger this race to crash the kernel. A patch is not currently available.
Windows Remote Access Connection Manager contains a null pointer dereference flaw affecting Windows 10 (versions 1809 and 21h2) and Windows 11 (version 23h2) that has been confirmed as actively exploited. A local attacker can trigger a denial of service condition without requiring authentication or user interaction. No patch is currently available for this vulnerability.
Windows LDAP service in Server 2022 and 2022 23H2 is vulnerable to denial of service through a null pointer dereference that can be triggered remotely without authentication. An attacker can exploit this flaw over the network to crash the LDAP service and disrupt directory access functionality. No patch is currently available for this vulnerability.
FreeRDP proxy versions prior to 3.22.0 are vulnerable to denial of service when processing specially crafted RDP server responses that trigger a null pointer dereference in the logon information handler. An unauthenticated attacker controlling a malicious RDP server can crash the FreeRDP proxy by sending a LogonInfoV2 PDU with empty domain or username fields. This vulnerability has been patched in version 3.22.0 and later.
Null pointer dereference in TP-Link Tapo C220 v1 and C520WS v2 cameras allows adjacent network attackers to crash the HTTP service via malformed POST requests with excessive Content-Length headers. Attackers can sustain denial of service through repeated crashes despite automatic device restarts. EPSS score is low (0.03%, 10th percentile), indicating minimal observed exploitation activity. No public exploit code or CISA KEV listing identified at time of analysis.
The Linux kernel's NVMe-TCP implementation fails to validate pointer initialization in nvmet_tcp_build_pdu_iovec(), allowing remote attackers to trigger NULL pointer dereferences and cause denial of service by sending H2C_DATA PDUs before completing proper command initialization. An unauthenticated network attacker can exploit this vulnerability to crash the kernel without requiring user interaction or special privileges.
iccDEV versions 2.3.1.1 and below are vulnerable to null pointer dereference in CIccProfileXml::ParseBasic() when processing maliciously crafted ICC color profiles, allowing remote attackers to trigger denial of service or data manipulation without user interaction. Public exploit code exists for this vulnerability, which affects applications using the iccDEV libraries for color profile handling. The vulnerability has been patched in version 2.3.1.2.
Null pointer dereference in iccDEV versions 2.3.1.1 and below allows remote attackers to trigger denial of service or data manipulation via maliciously crafted ICC color profile data, with public exploit code currently available. The vulnerability stems from unsafe handling of user-controllable input in the CIccTagXmlFloatNum<>::ParseXml() function and may enable code execution depending on application context. Upgrade to version 2.3.1.2 to remediate.
iccDEV versions 2.3.1.1 and below contain a null pointer dereference in the CIccXmlArrayType() function that allows remote attackers to trigger denial of service, data manipulation, or potentially achieve code execution through crafted ICC profile data. The vulnerability stems from unsafe handling of user-controlled input in binary structured data and has public exploit code available. Upgrade to version 2.3.1.2 or later to remediate.
A null pointer dereference vulnerability in the Linux kernel's libceph library occurs when free_choose_arg_map() is called after a partial memory allocation failure, allowing a local attacker with low privileges to cause a denial of service. The vulnerability exists because the function does not validate pointers before dereferencing them during cleanup operations. A patch is available to add proper pointer checks and make the cleanup routine resilient to incomplete allocations.
SIPp is vulnerable to a NULL pointer dereference that can be triggered by remote attackers sending malicious SIP messages during active calls, resulting in application crashes and denial of service. Under certain conditions, this vulnerability may also enable arbitrary code execution, potentially compromising system integrity and availability. No patch is currently available.
HarfBuzz::Shaper for Perl versions before 0.032 contain a null pointer dereference in the bundled HarfBuzz library that allows remote attackers to cause a denial of service without authentication or user interaction. The vulnerability affects applications using vulnerable versions of the library and results in service unavailability. No patch is currently available.
Remote denial of service in Windows LSASS affects Windows 10 and 11 through a null pointer dereference that an unauthenticated attacker can trigger over the network. The vulnerability causes service unavailability but does not enable code execution or data theft. No patch is currently available, leaving affected systems vulnerable until Microsoft releases a fix.
In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.
In the Linux kernel through 4.14.13, the rds_cmsg_atomic function in net/rds/rdma.c mishandles cases where page pinning fails or an invalid address is supplied, leading to an rds_atomic_free_op NULL. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.
Denial of service in Samba on Alpine Linux causes the smbd service to crash via a NULL pointer dereference triggered by remote unauthenticated network requests. Alpine Linux has issued a fix in samba 4.23.8-r0, and no public exploit identified at time of analysis. The CVSS 7.5 score reflects high availability impact with a network attack vector requiring no privileges or user interaction.
Null pointer dereference in GNU libredwg 0.13.4's Layer table encoding function allows a local attacker to crash any application built on the library by supplying a DWG file whose LAYER entity has no material handle assigned. The root cause is commit 27118c40 (
Null pointer dereference in GPAC MP4Box up to commit f1219cde causes a local denial-of-service when processing crafted VRML/MPEG-4 scenegraph content via the MP4Box tool. The crash originates in scenegraph/vrml_tools.c, specifically in the cyclic traversal flag logic where a node pointer is dereferenced without a NULL guard. A publicly available proof-of-concept exploit exists, and the patch was merged in release abi-16.23. No public exploitation activity (KEV) has been observed; this is a low-severity, locally-exploitable tool crash with no confidentiality or integrity impact.
NULL pointer dereference in the 5G NR baseband of Samsung Exynos processors and modems causes a denial-of-service condition when a malformed RRC Reconfiguration message is received from the network. Sixteen Exynos chip variants are affected, spanning Samsung flagship, mid-range, and wearable devices - including Exynos 850, 1080, 2100, 2200, 2400, W920, W930, W1000, Modem 5410, and others. An attacker capable of injecting or spoofing RRC layer signaling (e.g., via a rogue base station) can trigger a crash in the L2/RRC processing stack, disrupting cellular connectivity. No public exploit code or active exploitation has been identified at time of analysis.
Null pointer dereference in GPAC's MP4Box scenegraph engine crashes the application when processing malformed MPEG-4 BIFS scene data. The flaw resides in gf_node_list_add_child within base_scenegraph.c, reachable when node registration encounters a zero instance count or a null node pointer in gf_node_unregister() and gf_node_get_name_and_id(). A public proof-of-concept exploit exists and a vendor-released patch (abi-16.23) is available; no active exploitation is recorded in CISA KEV.
Null pointer dereference in GPAC's MP4Box tool crashes the process when parsing crafted MPEG-4/VRML scene graph data containing a malformed MFURL field, triggering the flaw inside gf_sg_mfurl_del() during scene graph cleanup. Local, low-privileged users can cause a denial of service by feeding MP4Box a specially crafted file; there is no confidentiality or integrity impact. A public proof-of-concept is available and the CVSS 4.0 vector confirms Exploit maturity of Proof-of-concept (E:P), making this straightforward for local attackers to reproduce, though impact remains limited to application crash.
Null pointer dereference in Systerel S2OPC through version 1.7.3 enables authenticated remote clients to crash the OPC-UA server by inducing heap allocation failures during subscription publish cycles. The defect in `msg_subscription_publish_bs__alloc_notification_message_items()` silently overwrites a NULL returned by a failed DataChangeNotification allocation with the result of a subsequent EventNotificationList allocation, masking the first failure and causing a deferred NULL dereference that terminates the server process. No public exploit or active exploitation has been identified; a vendor patch is available via GitLab commit 8848f051.
IURegistryFilter.sys, the kernel-mode registry filter driver bundled with IOBit Uninstaller 15.5.0.11, can be crashed by any local low-privileged user by sending a crafted IOCTL to the sub_11838 dispatch handler, which dereferences a null pointer in kernel context and produces a system-wide crash (BSOD). The attack surface is broader than a single product: the advisory explicitly states that the identical IURegistryFilter.sys driver ships across multiple other IObit product families, meaning all such products on an affected host are vectors. A published proof-of-concept exploit exists (CVSS 4.0 E:P), and no vendor patch is available - the vendor did not respond to coordinated disclosure.
Null pointer dereference in mrubyc through 4.0.0 allows an attacker who can supply untrusted .mrb bytecode to crash any application embedding the VM. The op_enter() handler in src/vm.c fails to validate execution context before dereferencing, and OP_ENTER instructions placed at the top level of a crafted bytecode file - where no call frame exists - trigger the dereference and terminate the embedding application. No public exploit or active exploitation has been identified at time of analysis, and real-world risk is bounded by the requirement to feed attacker-controlled bytecode to the target application.
Null pointer dereference in Microsoft Skype for Business Server allows any authenticated low-privilege user to crash the server over the network, causing a complete denial of communications service. Three on-premises product lines are affected: Server 2015 CU13, Server 2019 CU8, and Subscription Edition CU1. No active exploitation is confirmed - SSVC rates exploitation as none and the attack is not automatable - but the low authentication bar (any valid SfB user account) makes this a credible insider threat or compromised-credential scenario.
Null pointer dereference in Windows Routing and Remote Access Service (RRAS) enables a network-authenticated attacker with low privileges to crash the service and cause denial of service across all major Windows and Windows Server releases. The vulnerability is triggered over the network without user interaction, making it suitable for disrupting VPN, dial-up, or routing services that rely on RRAS. No public exploit or active exploitation has been identified at time of analysis; a vendor-released patch is available.
Null pointer dereference in Windows Schannel - Microsoft's native TLS/SSL security package - allows an authenticated network attacker to crash the affected service on Windows Server 2022, Windows Server 2025, and Windows 11 versions 23H2 through 26H1. The CVSS vector (AV:N/AC:H/PR:L) places this as a moderate-severity denial-of-service requiring valid credentials and non-trivial triggering conditions, with no confidentiality or integrity impact. No public exploit code or active exploitation has been identified at time of analysis.
Null pointer dereference in Windows Active Directory Domain Services (AD DS) enables a low-privileged, authenticated network attacker to crash the service and deny domain authentication. The flaw affects a broad range of Windows Server versions from Windows Server 2012 through Windows Server 2025 as well as Windows 10 and Windows 11 client platforms configured with the AD DS role. Microsoft has issued patches; no public exploit code or CISA KEV listing has been identified at time of analysis.
Authenticated denial of service in Fortinet FortiOS, FortiPAM, and FortiProxy allows a high-privileged network attacker to crash the httpsd daemon by sending specially crafted HTTP requests, exploiting a NULL pointer dereference (CWE-476). The vulnerability spans FortiOS 7.2.x and 7.4.x, FortiProxy 7.2 through 7.6.6, and every FortiPAM release from 1.0.0 through 1.9.0. No active in-the-wild exploitation is confirmed, but the CVSS temporal metric E:P indicates proof-of-concept code exists; Fortinet has released an official fix under advisory FG-IR-26-173.
NULL-pointer dereference in code handling Authentication and Key Agreement (AKA) Synchronization-Failure messages causes a process crash when a malformed or unexpected AKA-Synchronization-Failure response is processed. The vulnerability affects software that implements 3GPP AKA authentication - a protocol used in mobile network authentication (3G/4G/5G) and EAP-AKA for Wi-Fi/IMS - as packaged by Ubuntu. No public exploit or CISA KEV listing has been identified at time of analysis, and the primary real-world impact is denial of service via crash of the authentication handling daemon.
Denial of service in IBM i 7.3 through 7.6 is achievable by any remote authenticated low-privilege user via a NULL pointer dereference, causing complete availability loss with no data exposure. The CVSS vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) confirms low-complexity network exploitation requiring only a valid user account and no user interaction. No public exploit code and no CISA KEV listing have been identified at time of analysis; IBM has released a patch via its support portal.
Denial of service in Hitachi Energy RTU500 Series CMU firmware allows an unauthenticated remote attacker to crash the IEC 60870-5-104 communication process by flooding the device with General Interrogation (GI) requests at short intervals. The high-load condition triggers a NULL pointer dereference in the last entry of the enhanced message queue, causing a BCI_IEC104 fatal write error, connection interruption, and automatic restart - severing bidirectional telecontrol communication. No public exploit code has been identified at time of analysis, and exploitation requires the ability to sustain elevated request rates against a reachable IEC 104 endpoint.
NULL pointer dereference in Samsung mTower's TEE kernel allows a Non-Secure caller to crash the secure world by supplying an invalid, zero, or stale session ID to the ioctl invoke path. The flaw exists in tee_ioctl_invoke() (entry_std.c) and tee_ta_invoke_command() (tee_ta_manager.c), where find_session() returns NULL without a guard before dereferencing sess->ctx, causing a secure-world fault. All mTower versions prior to commit afef59aa6f55c5d5ebf9b14bc020bf1c2c37489a are affected; no public exploit has been identified at time of analysis.
Null pointer dereference in FLVMeta up to 1.2.2 causes a process crash when parsing a malformed AMF object from a crafted FLV file, resulting in denial of service. The flaw resides in `amf_object_get` (and the parallel `amf_object_set`) in `src/amf.c`, where a chained double dereference `node->next->next` executes without first confirming `node->next` is non-NULL. A public SEGV proof-of-concept exists, though the project maintainer disputes the security relevance, stating no exploitation path beyond a crash has been demonstrated. No CISA KEV listing; no public exploit identified at time of analysis beyond the crash reproducer.
Null pointer dereference in armink struct2json 1.0 allows remote attackers to crash any application that deserializes attacker-controlled JSON through the library's `S2J_STRUCT_GET_string_ELEMENT` function. The root cause is an absence of null validation on the `valuestring` field during JSON deserialization in `struct2json/inc/s2jdef.h`, yielding a remotely triggerable denial-of-service. A public proof-of-concept exploit has been disclosed on GitHub; no vendor patch has been issued and the vendor did not respond to responsible disclosure.
NULL pointer dereference in TP-Link TL-WR841N v14's UPnP service allows adjacent-network attackers to crash the UPnP process by sending a specially crafted SOAP state variable query, resulting in a denial-of-service condition. The affected UPnP functionality - including device discovery and state management - remains unavailable until the process is restarted or the device is rebooted. No public exploit code has been identified at time of analysis, and this vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog.
NULL pointer dereference in the UPnP SOAP request handler of the TP-Link TL-WR841N v14 allows an adjacent-network attacker to crash the UPnP daemon by sending a crafted SOAP action request with unexpected XML content, producing a denial-of-service condition until the service is restarted or the device rebooted. Impact is confined to UPnP functionality; the router itself continues operating. No public exploit identified at time of analysis, and this CVE is not listed in the CISA KEV catalog. TP-Link has released a firmware patch addressing this flaw.
Null pointer dereference in PLANET GS-4210-16P2S managed switch firmware before 3.441b260626 allows remote authenticated attackers to crash the web management interface by sending a crafted request. The web_poe_alive_rmtip_post handler in /cgi-bin/dispatcher.cgi dereferences the rmtIP POST parameter without first validating its presence, meaning a missing parameter is dereferenced as NULL, faulting the CGI process and rendering the web management interface unavailable. No active exploitation (CISA KEV) or public proof-of-concept has been identified at time of analysis, though the trigger is trivially simple - a single omitted parameter - for any attacker already holding administrative credentials.
NULL pointer dereference in Wazuh agent enrollment (versions 4.0.0-4.14.6) allows a network-positioned attacker operating a rogue manager or performing a man-in-the-middle attack to deterministically crash the agent process by supplying a malformed key response containing fewer than four space-separated fields. The flaw resides in `w_enrollment_process_agent_key()` in `src/shared/enrollment_op.c`, which passes unvalidated NULL entries from `OS_StrBreak()` directly into `OS_IsValidName()`, where an unguarded `strlen()` call on a NULL pointer terminates the agent. The attack is constrained by high complexity conditions (no CA certificate configured, or active MITM capability), and no public exploit code or CISA KEV listing has been identified at time of analysis. The issue is fixed in Wazuh 4.14.7.
Null pointer dereference in iOS and iPadOS allows a locally installed app to trigger unexpected system termination (device crash/reboot) by supplying crafted input that bypasses input validation. Affected versions span the legacy 18.x branch (prior to 18.7.9) and the current 26.x branch (prior to 26.5), covering a broad swath of Apple mobile devices. No active exploitation has been identified - CISA KEV status is absent, SSVC rates exploitation as none, and EPSS sits at the 1st percentile - placing this squarely as a patch-cycle priority rather than an emergency response item.
Substance3D - Designer crashes on availability when a victim opens a specially crafted malicious file, triggering a NULL Pointer Dereference that terminates the application. Adobe Substance 3D Designer users across all tracked versions (CPE wildcard) are affected, with impact limited to application-level denial of service - no code execution, data disclosure, or integrity compromise is possible. No public exploit code exists and this vulnerability is not listed in the CISA KEV catalog, consistent with its low exploitability ceiling (requires local victim interaction).
NULL pointer dereference in the Zephyr RTOS OCPP 1.6 client allows a malicious or compromised OCPP central system - or a man-in-the-middle on an unencrypted ws:// connection - to remotely crash the OCPP reader thread of an EV charge point by returning a malformed CALLRESULT uid field. Impact is availability-only and platform-conditional: on MMU/MPU-equipped or CONFIG_NULL_POINTER_EXCEPTION_DETECTION-enabled Zephyr targets, the fault invokes the fatal handler and produces a remote denial of service; on bare-metal targets where address 0 is readable, the call returns 0 and is benign. No public exploit is identified at time of analysis, and the vendor-supplied patch at the referenced commits is known to be incomplete - a second unguarded strtok_r/atoi pair in the same function path remains exploitable via a uid containing one token but no second hyphen-delimited segment.
Zephyr RTOS's Hearing Access Service (HAS) GATT peripheral crashes when a previously bonded Bluetooth peer reconnects during a boot-time race window before bt_has_register() completes service initialization. The security_changed() callback - registered unconditionally via BT_CONN_CB_DEFINE - fires against NULL attribute pointers, triggering either a kernel assertion or a NULL dereference in bt_gatt_is_subscribed(). With CVSS AV:A/AC:H and confirmed DoS-only impact, this represents a medium-severity availability risk against embedded hearing-aid devices running Zephyr 3.6.0 through 4.4.1; no public exploit code has been identified, and a vendor patch is confirmed at 4.4.2.
Null pointer dereference in DrayTek VigorSwitch's formlogout web management function allows authenticated remote administrators to crash the management service, causing a denial of service across 28+ switch models spanning the G, P, Q, FX, and PX product lines. The flaw stems from absent validation of an empty or missing Cookie header before string handling in the formlogout handler, and is patched in firmware versions released under DrayTek's August 2026 security advisory. No public exploit code or CISA KEV listing is referenced in the available data.
Null pointer dereference in llama.cpp's ggml-RPC server (commit bec4772f6) allows remote unauthenticated denial of service against any deployment exposing the RPC port to the network. The flaw resides in rpc_server::graph_compute, where a graph node with id=0 bypasses a conditional null check, enabling a single crafted TCP packet to crash the server process. No standalone exploit code is publicly available at time of analysis, though the upstream fix PR includes a Python test script that reproducibly triggers the crash in under one second.
NULL pointer dereference in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 allows a local low-privileged attacker to crash the system, causing a denial of service. Exploitation requires high attack complexity, suggesting a race condition or specific system state must be induced. No public exploit code exists and this vulnerability is not listed in the CISA KEV catalog; a vendor patch is available via IBM support.
Denial of service in FreeIPA's ipa-enrollment SLAPI plugin allows any authenticated LDAP client to crash the 389 Directory Server by sending a malformed extended operation. The flaw (CWE-476, null pointer dereference) is triggered by omitting the request value for the JOIN_OID in the ipa-enrollment extended operation, causing the server to dereference a null pointer and crash. No public exploit or active exploitation has been identified at time of analysis; however, the low attack complexity and network-accessible vector make this a credible threat against any RHEL Identity Management deployment.
Wireshark's Bluetooth BR/EDR FHS protocol dissector crashes via a NULL pointer dereference (CWE-476) when processing a malformed packet capture, affecting the 4.6.x branch (4.6.0-4.6.7) and the 4.4.x branch (4.4.0-4.4.18). An attacker who can persuade a user to open a specially crafted capture file can crash the Wireshark process, resulting in an application-level denial of service with no confidentiality or integrity impact. No public exploit code has been identified and this CVE does not appear in the CISA KEV catalog; EPSS data was not included in the available intelligence.
Wireshark's CMS protocol dissector crashes via a null pointer dereference (CWE-476) in versions 4.6.0 through 4.6.7 and 4.4.0 through 4.4.17, allowing denial of service against the application. An attacker can cause Wireshark to crash by inducing a user to open a malformed capture file or by injecting crafted CMS protocol traffic into a live capture session. No public exploit has been identified at time of analysis, and the CVSS local attack vector combined with high complexity limits realistic exposure to targeted scenarios.
Denial of service in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 is achievable by an adjacent-network attacker exploiting a null pointer dereference, capable of crashing the targeted system without requiring authentication or user interaction. The vulnerability affects IBM's enterprise UNIX operating system and its PowerVM Virtual I/O Server layer, where availability is operationally critical for hosted workloads. No public exploit code has been identified at time of analysis, and IBM has released a remediation patch via official advisory.
Denial of service in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 is achievable by an adjacent-network attacker through a NULL pointer dereference in a network-handling code path. Exploitation requires no authentication but demands high attack complexity, substantially limiting opportunistic or internet-scale attacks. IBM has released a patch via its official support portal; no public exploit code or CISA KEV listing has been identified at time of analysis.
Process-terminating denial of service in Wekan's export API (versions prior to 10.38) allows an attacker to crash the entire server with a single crafted GET request. Four export handlers in models/export.js and models/exportExcel.js called user._id.toString() on the undefined result of ReactiveCache.getUser() without a null guard; supplying an invalid authToken query parameter to any export endpoint triggers a TypeError that propagates as an unhandled async rejection and terminates the Meteor/Node.js process, denying service to all concurrent users. No public exploit code has been identified at time of analysis and this CVE does not appear in the CISA KEV catalog, though the attack path is trivially reproducible given the explicit description and public commit diff.
The AdvertiseListenerImpl component in mod_cluster's core multicast UDP handler can be permanently crashed by a single crafted datagram, affecting Red Hat JBoss Enterprise Application Platform 7 and 8, JBoss Web Server 5 through 7, and Red Hat Single Sign-On 7. An unauthenticated attacker with adjacency to the mod_cluster multicast group can silently terminate the advertise listener thread, causing the affected node to stop receiving cluster topology updates until manually restarted - with no runtime indication of failure since isListening() continues returning true. No public exploit is identified at time of analysis, and this CVE is not listed in the CISA KEV catalog based on available data.
BusyBox wget's FEATURE_WGET_TIMEOUT handler in networking/wget.c crashes with a null pointer dereference when the -T (timeout) argument is processed, affecting versions 1.30.0 and 1.30.1. Local users who can invoke BusyBox wget can trigger a denial-of-service crash of the wget process by supplying a crafted -T argument value, exploiting an unguarded pointer dereference in the shared getopt32 option-parsing library. No public exploit has confirmed active production exploitation, but a public proof-of-concept is available and the CVE is not listed in CISA KEV.
NULL-pointer dereference in kin-openapi's request validation pipeline (versions 0.2.0 through 0.143.0) enables any unauthenticated remote client to crash request validation with a single crafted HTTP request. The defect resides in defaultContentParameterDecoder within openapi3filter/req_resp_decoder.go, where mt.Schema.Value is dereferenced without a nil guard when a content parameter's application/json media type declares no schema - a construct that is explicitly valid under both OpenAPI 3.0.x and 3.1.x, meaning doc.Validate() will not surface the issue at startup. Depending on integration depth, an attacker can cause either unbounded panic-log growth or a complete process crash; no public exploit or CISA KEV listing exists at time of analysis, and the vendor released a confirmed fix in v0.144.0.
Denial-of-service in TOTOLINK EX1200L firmware 9.3.5u.6146_B20201023 allows authenticated remote attackers to crash the device by sending a crafted request to the setWizardCfg function in /cgi-bin/cstecgi.cgi, triggering a null pointer dereference. Impact is limited strictly to availability - no confidentiality or integrity compromise - but a publicly available proof-of-concept exploit on GitHub (CVSS 4.0 E:P) significantly lowers the exploitation barrier. No vendor patch has been identified and the device is not listed in CISA KEV, making access restriction to the management interface the primary mitigation.
Remote denial-of-service in TOTOLINK EX1200L firmware 9.3.5u.6146_B20201023 allows a low-privileged authenticated attacker to crash the device by submitting a malformed request to the setPasswordCfg function in the CGI-based web management interface. Exploitation triggers a null pointer dereference in /cgi-bin/cstecgi.cgi, rendering the device unresponsive and disrupting its network extension services entirely. A public proof-of-concept exploit exists on GitHub, lowering the bar for exploitation, though no active exploitation has been recorded in CISA KEV at time of analysis.
Null pointer dereference in HarmonyOS 6.1.0's image codec module allows a local, unprivileged process to crash the codec and degrade device availability. Huawei disclosed this via their August 2026 security bulletins covering consumer devices, vision products, wearables, and laptops running HarmonyOS. No active exploitation has been identified (SSVC: Exploitation none), and the impact is bounded to partial availability loss with no confidentiality or integrity exposure.
Null pointer dereference in the HarmonyOS image codec module causes a local denial-of-service condition, degrading availability of affected devices running HarmonyOS 6.1.0. The flaw is triggered locally without requiring elevated privileges, and successful exploitation crashes or hangs the image codec process. No active exploitation has been identified; no public exploit code is known at time of analysis.
Null dereference in the load-balancing subsystem of Absolute Secure Access servers (prior to 14.57) allows unauthenticated remote attackers to crash the internal load balancer process by sending a single crafted packet. Exploitation is constrained to deployments with load balancing enabled; critically, the Secure Access server itself remains operational after the attack, continues to accept client connections, and retains the ability to failover - limiting real-world impact to partial load-distribution disruption rather than full service outage. No public exploit code has been identified and no confirmed active exploitation is recorded at time of analysis.
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Fix NULL dereference in ffa_partition_info_get() ffa_partition_info_get() passes uuid_str directly to uuid_parse() without a NULL check. When a caller passes NULL, uuid_parse() -> __uuid_parse() -> uuid_is_valid() dereferences the pointer, causing a kernel panic: | Unable to handle kernel NULL pointer dereference at virtual address | 0000000000000040 | pc : uuid_parse+0x40/0xac | lr : ffa_partition_info_get+0x1c/0x94 [arm_ffa] Add a NULL guard before uuid_parse() so a NULL argument returns -ENODEV instead of crashing. Callers are expected to always supply a valid partition UUID, so NULL is not a supported input.
In the Linux kernel, the following vulnerability has been resolved: net/sched: Handle TC_ACT_REDIRECT from qdisc filter chains When a TC filter attached to a qdisc filter chain returns TC_ACT_REDIRECT (ex: via an eBPF program calling bpf_redirect() or an act_bpf action), the redirect was silently lost i.e no qdisc classify function handled TC_ACT_REDIRECT, so the packet fell through the switch and was enqueued normally instead of being redirected. This has been broken since bpf_redirect() was introduced for TC in commit 27b29f63058d ("bpf: add bpf_redirect() helper"). We got lucky for a long time because bpf_net_context was a per-CPU variable that was always available. commit 401cb7dae813 ("net: Reference bpf_redirect_info via task_struct on PREEMPT_RT.") turned bpf_net_context into a task_struct member that is only set up by explicit callers. Without a caller setting it up, bpf_redirect() itself crashes with a NULL pointer dereference in bpf_net_ctx_get_ri(). However, even with bpf_net_context available, TC_ACT_REDIRECT from qdisc filter chains cannot be honored without adding skb_do_redirect() calls to every qdisc classify function, which would require changes across net/sched/. Isolate it to ebpf core where it belongs. Instead, add a tcf_classify_qdisc() inline helper in pkt_cls.h, as a wrapper around tcf_classify() for use by qdisc classify functions and tcf_qevent_handle(). When the classify verdict is TC_ACT_REDIRECT, the wrapper converts it to TC_ACT_SHOT, dropping the packet rather than letting it continue silently. Dropping is preferred over letting the packet through because the user immediately sees packet loss. Silently passing the packet through would hide the problem and leave the user wondering why their redirect is not working. The clsact fast path, tc_run() continues to call tcf_classify() directly and is unaffected: TC_ACT_REDIRECT is returned as-is and handled by sch_handle_egress/ingress() calling skb_do_redirect() as before.
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7925: fix possible NULL-pointer deref in mt7925_mcu_bss_he_tlv() mt76_connac_get_he_phy_cap routine can theoretically return NULL so check cap pointer before dereferencing it.
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: use kvzalloc to allocate struct dc struct dc has grown large over time (most of it the two inlined dc_scratch_space copies) and now sits close to the page allocator's 4 MiB contiguous allocation limit. Its actual size is not fixed by the source alone, it also depends on the compiler and the .config, so it can easily cross 4 MiB, e.g. with a newer GCC or a config change. dc_create() allocates it with kzalloc(). Once struct dc exceeds 4 MiB the request is rounded up to order 11 (8 MiB), which is above MAX_PAGE_ORDER, so the page allocator warns and returns NULL. dc_create() then fails, DM init fails and amdgpu probe aborts with -EINVAL: WARNING: mm/page_alloc.c:5197 at __alloc_frozen_pages_noprof+0x2f9/0x380 dc_create+0x38/0x660 [amdgpu] amdgpu_dm_init+0x2d9/0x510 [amdgpu] dm_hw_init+0x1b/0x90 [amdgpu] amdgpu_device_init.cold+0x150d/0x1e13 [amdgpu] amdgpu_driver_load_kms+0x19/0x80 [amdgpu] amdgpu_pci_probe+0x1e2/0x4c0 [amdgpu] dc_create() then returns NULL and DM init fails, which aborts the whole GPU init and makes amdgpu probe fail with -EINVAL ("hw_init of IP block <dm> failed -22"), leaving the display unusable. The subsequent amdgpu_irq_put() warnings during teardown are just fallout of unwinding a half-initialized device. struct dc is a software-only bookkeeping structure that is never handed to hardware DMA and is only ever kept as an opaque pointer, so it does not require physically contiguous memory. Allocate it with kvzalloc() (and free it with kvfree()) so that the allocator can fall back to vmalloc() when a contiguous allocation of that size is not available, which also avoids the MAX_PAGE_ORDER warning entirely. v2: - Rebase to amd-staging-drm-next. (cherry picked from commit 991e0516a8072f2292681c6ae98a924ab0e32575)
In the Linux kernel, the following vulnerability has been resolved: serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms Commit b1b4efea05a5 ("serial: 8250_mid: Disable DMA for selected platforms") replaced the dnv_board setup and exit callbacks with PTR_IF(false, ...), which evaluates to NULL. However, the three call sites in mid8250_probe() and mid8250_remove() unconditionally dereference these function pointers without NULL checks, causing a NULL pointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), or Snowridge (SNR) platform. Fix this by adding the missing NULL checks before calling the setup and exit callbacks.
In the Linux kernel, the following vulnerability has been resolved: drm/dp_mst: Handle torn-down topology gracefully in drm_dp_mst_topology_queue_probe() A hotplug or link-loss event can tear down the MST topology (setting mgr->mst_state = false and mgr->mst_primary = NULL) concurrently with a caller invoking drm_dp_mst_topology_queue_probe(). Since the check is already performed under mgr->lock, the condition is not a programming error but a valid race -- the topology was valid when the caller decided to call this function, but was torn down before the lock was acquired. Replace the drm_WARN_ON() with a graceful early return. This eliminates spurious kernel warnings and the resulting compositor crashes observed when connecting/disconnecting DP MST monitors, while keeping the correct behavior of doing nothing when MST is not active. A drm_dbg_mst() trace is added so the skipped probe remains observable under MST debug logging. The existing WARN_ON(mgr->mst_primary) in drm_dp_mst_topology_mgr_set_mst() already catches the case where the topology is initialized twice, so no diagnostic coverage is lost.
MongoDB Server's query planner contains a null pointer dereference (CWE-476) that enables any authenticated user holding read-level privileges to crash the server process by submitting a specially crafted query against a collection with a text index. Affected branches span MongoDB 7.0.x, 8.0.x, and 8.3.x, with fixed releases available in 7.0.40, 8.0.29, and 8.3.8 respectively. No public exploit or active exploitation is identified; SSVC rates exploitation as none and the attack is not automatable, though the availability impact is total for the targeted server instance.
Remote Registry Service denial of service in Microsoft Windows allows network-authenticated attackers to crash the service via a crafted RPC request triggering a null pointer dereference. The CVSS vector (AV:N/AC:L/PR:L/UI:N) confirms that any domain or local account with network access to the service is sufficient for exploitation - no elevated privileges required. No public exploit code has been identified and this vulnerability is not listed in CISA KEV at time of analysis.
Null pointer dereference in the Windows Remote Registry Service enables an authenticated network attacker to crash the service, resulting in denial of availability for remote registry operations across a broad range of Microsoft platforms. Affected builds span Windows 10/11 consumer releases and Windows Server 2012 through Server 2025, representing the near-entirety of Microsoft's currently supported Windows footprint. No public exploit identified at time of analysis, and CISA's SSVC framework rates exploitation as 'none' with partial technical impact, positioning this as a standard patch-cycle priority rather than an out-of-band emergency.
Denial of service in Velociraptor allows any authenticated user - including those holding only the read-only reader role - to immediately terminate the entire server process with a single API call. By invoking SetPassword with a username that does not exist, an attacker triggers a null pointer dereference (CWE-476) that crashes the process, rendering the DFIR platform completely unavailable. No public exploit has been identified at time of analysis, but the trivially low exploitation barrier - any valid credential suffices - makes this a credible insider or compromised-account threat in any environment where Velociraptor is operationally depended upon.
NULL pointer dereference in Zephyr RTOS's experimental device_next USB DFU class crashes any device where DFU download is enabled when a USB host sends a zero-length DFU_DNLOAD terminator after initiating a valid transfer. The result is a fatal CPU fault causing device crash or reset - impact is strictly limited to availability, with the vendor and commit diff explicitly confirming no memory corruption or information disclosure. No public exploit has been identified at time of analysis, and exploitation requires physical control of the attached USB host.
NULL pointer dereference in the shim application's dp.c library exposes Red Hat Enterprise Linux 7, 8, and 9 systems using UEFI Secure Boot to a local denial-of-service condition. An attacker with high local privileges and the ability to interact with the shim boot path can trigger the missing NULL pointer check, potentially disrupting the boot process. No public exploit code has been identified at time of analysis, and the low CVSS score of 3.9 reflects the constrained attack prerequisites, though the changed scope (S:C) signals that the impact crosses from the shim component into the broader boot environment.
Null pointer dereference in OP-TEE OS through version 4.10.0 allows a low-privileged Normal World process to crash the entire Trusted Execution Environment by opening a session directly on the Widevine pseudo-TA when CFG_WIDEVINE_PTA is enabled. The open_session handler in core/pta/widevine.c calls is_user_ta_ctx(session->ctx) without first checking that session is non-NULL, faulting the TEE at S-EL1 and making all TEE services - including secure key storage and other Trusted Applications - unavailable until reboot. No public exploit code exists and no CISA KEV listing is present; the upstream fix is confirmed by commit 0aadfc2 and the CVSS 4.0 score of 5.7 reflects the local, low-privilege, configuration-dependent exploitation conditions.
Authenticated denial of service in HashiCorp Consul Community Edition and Consul Enterprise 1.18.0-2.0.2 allows a network attacker holding config-entry write permission to crash the Consul server agent by submitting a crafted service-router configuration entry. The flaw is rooted in a null pointer dereference (CWE-476) triggered along the Enterprise-to-Community Edition downgrade code path, meaning only deployments undergoing or having undergone that transition are exploitable. No public exploit code or active exploitation confirmed by CISA KEV has been identified; vendor-released patches are available and confirmed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
Kernel null pointer dereference in Imagination Technologies Graphics DDK allows a local non-privileged user to crash the host system via crafted GPU system calls. Multiple release branches are affected, including DDK 26.1 RTM1, 25.1-25.3 RTM, 24.2 RTM2, 23.2 RTM2, and 1.18 RTM2. An attacker with a local shell account on a device running the affected kernel driver can trigger platform instability or a full denial of service - no exploit has been publicly identified at time of analysis, and EPSS probability is extremely low at 0.15% (5th percentile).
Null pointer dereference in the llama.cpp LLaMA-Android JNI wrapper's bench_1model() function allows denial of service via a crafted model file. Builds b1886 through b7445 (packaged releases 0.9.0-0.17.1) are affected; the function skips null validation on the model context pointer before dereferencing it, so supplying a malformed or truncated GGUF model file triggers a SIGSEGV that terminates the Android application process. No public exploit has been identified at time of analysis and this is not listed in CISA KEV, but the attack path is mechanically simple for anyone able to deliver a crafted model to the device.