Null Pointer Dereference

Null pointer dereference in Apple operating systems (iOS, iPadOS, macOS Tahoe, tvOS) allows local network attackers to cause denial of service by sending crafted input that bypasses validation. The vulnerability affects all versions prior to iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, and tvOS 26.5. No code execution or data compromise is possible; impact is limited to availability disruption on affected devices.

Null pointer dereference in Open5GS Session Management Function (SMF) up to version 2.7.7 allows authenticated remote attackers to cause denial of service by manipulating the smf_nsmf_handle_create_data_in_hsmf function. Publicly available exploit code exists, and the project has been notified but has not yet released a patch.

Nil-pointer dereference in free5GC's Unified Data Repository (UDR) v4.2.1 allows an OAuth2-authenticated network attacker to repeatedly panic the `amf-subscriptions` DELETE handler, forcing HTTP 500 responses and elevated CPU and log overhead on each request. The flaw stems from a missing `return` after the subscription-not-found branch in `RemoveAmfSubscriptionsInfoProcedure`, causing the handler to dereference a nil map entry even when it has already set a 404 problem-details response. No public exploit is in CISA KEV, but a full end-to-end proof-of-concept is embedded in GHSA-4rqf-grm6-vf75 and was validated against the official Docker compose lab, making exploitation straightforward for any holder of a valid `nudr-dr` token.

Nil pointer dereference in free5GC v4.2.1's Policy Control Function (PCF) allows any caller holding a valid npcf-policyauthorization OAuth2 token to trigger a Go runtime panic on every POST to /npcf-policyauthorization/v1/app-sessions, causing HTTP 500 responses that deny app-session creation for that request. The flaw activates only when suppFeat="1" enables traffic-routing feature negotiation and a medComponents entry supplies afAppId without AfRoutReq - a valid input combination the handler passes into provisioningOfTrafficRoutingInfo with routeReq==nil and then immediately dereferences. Publicly available exploit code exists in the GHSA advisory; a vendor patch is confirmed at PCF module v1.4.3 / free5GC v4.2.2. No confirmed active exploitation (CISA KEV absent) and EPSS sits at 0.05%, consistent with the product's niche 5G core deployment footprint.

Local denial-of-service in the Linux kernel's mpi3mr SCSI driver causes a system crash via NULL pointer dereference during resource cleanup. An authenticated local user on a system using MPI3-based storage controllers can trigger a kernel panic by inducing the error path where queue creation fails: the driver frees reply or request queue memory but subsequently attempts to memset the now-freed (NULL) pointer, crashing the system. No public exploit exists and EPSS sits at 0.02% (7th percentile), indicating low real-world exploitation probability at time of analysis.

NULL pointer dereference in the Linux kernel's UFS host controller driver crashes the kernel when ufshcd_mcq_req_to_hwq() returns NULL during MCQ command completion, allowing an authenticated local user on affected hardware to trigger a denial of service. The vulnerability is confined to the SCSI UFS subsystem's ufshcd_add_command_trace() function and impacts systems with UFS storage operating in Multi-Circular Queue mode - primarily ARM64 embedded and mobile platforms using MediaTek UFS controllers. No public exploit has been identified at time of analysis, and EPSS at 0.02% (5th percentile) reflects the highly constrained attack surface.

Null pointer dereference in the Linux kernel's rxrpc and AFS subsystems allows a local authenticated attacker to trigger a kernel denial of service. The rxrpc_kernel_lookup_peer() function can return either NULL or an error pointer on failure, but its AFS callers only tested for NULL - leaving unchecked error pointer values that, when dereferenced, cause a kernel panic. No public exploit has been identified and EPSS probability sits at 0.02%, indicating low observed exploitation interest; however, the availability impact is rated High by CVSS due to the potential for full system crash.

Denial of service in the Linux kernel's drm/amdkfd (AMD GPU Kernel Fusion Driver) subsystem allows a local authenticated user to crash the kernel via a NULL pointer dereference. The flaw originates in the error handling path of the queue update routine, where a buffer object (bo) is not unreserved upon failure, leaving the subsystem in an inconsistent state that triggers a null dereference. No active exploitation is known; EPSS is 0.02% (5th percentile), and the impact is limited strictly to availability - confidentiality and integrity are unaffected.

Null pointer dereference in the Linux kernel's ASoC AMD ACP machine-common driver can be triggered by a local authenticated user to crash the kernel, resulting in a denial of service. The functions acp_card_rt5682_init() and acp_card_rt5682s_init() in sound/soc/amd/acp/acp-mach-common.c fail to validate the return value of clk_get(), allowing an invalid error pointer to be dereferenced by downstream clock core functions. No public exploit code exists and no active exploitation has been confirmed; EPSS probability stands at 0.02% (5th percentile), reflecting very low real-world exploitation likelihood.

NULL pointer dereference in the Linux kernel's ALSA USB-audio Scarlett2 mixer quirk allows a local low-privileged user to crash the kernel (denial of service) by presenting a malformed USB descriptor with zero endpoints. Affected systems running unpatched kernels from the initial commit onward through stable branches 6.1.x, 6.6.x, 6.12.x, 6.18.x, and 6.19.x are exposed whenever the USB-audio driver enumerates a crafted or emulated Scarlett2-type device. No active exploitation is confirmed (not in CISA KEV) and no public exploit identified at time of analysis; the EPSS score of 0.03% (8th percentile) confirms very low real-world exploitation probability.

NULL pointer dereference in the Linux kernel's xhci USB host controller debugfs interface allows a local low-privileged user to crash the kernel (denial of service) by reading portli debugfs files. The flaw surfaces when xhci's max_ports count exceeds the number of ports covered by Supported Protocol capabilities - producing NULL rhub pointers - which the portli read handler dereferences without checking. No public exploit has been identified and EPSS is 0.02% (5th percentile), indicating negligible broad exploitation interest; the vulnerability is not listed in CISA KEV.

NULL pointer dereference in the Linux kernel's USB gadget f_tcm (USB Target Controller Module) driver allows an authenticated local attacker with USB host access to trigger a kernel panic by sending Bulk-Only Transport (BOT) commands during a race window where the ConfigFS-managed nexus pointer is uninitialized or torn down. Affected systems are those acting as USB gadgets - primarily embedded devices and single-board computers - running kernel versions from commit c52661d60f636d17e26ad834457db333bd1df494 onward without the applied fix. No public exploit exists and the vulnerability is absent from CISA KEV; EPSS of 0.02% (7th percentile) confirms negligible observed exploitation activity.

Null pointer dereference in the Linux kernel USB NCM gadget subsystem (f_ncm) causes kernel crashes during USB device disconnection cycles. The vulnerability stems from a net_device lifecycle management flaw where the network device outlives its parent gadget device, leaving dangling sysfs links that trigger null pointer dereferences. Systems acting as USB NCM gadgets - common in embedded Linux, postmarketOS, and USB tethering scenarios - are exposed to local denial-of-service conditions upon USB reconnection. No public exploit exists and EPSS stands at 0.02%, indicating very low exploitation probability; however, the bug can be triggered by any low-privileged local user on an affected configuration.

NULL pointer dereference in the Linux kernel's PowerPC perf subsystem crashes the kernel when user callchain collection is attempted after a thread's mm structure has been released. Local authenticated users with BPF execution privileges on PowerPC systems can trigger a kernel panic by running profiling tools such as bcc-tools' profile.py at the moment of thread exit, resulting in a full system denial of service. No public exploit has been identified at time of analysis and EPSS is 0.02% (4th percentile), reflecting low widespread exploitation probability; however, the bug is confirmed by kernel maintainers with a full panic trace and patches are available in stable kernel releases.

NULL pointer dereference in the Linux kernel's hisi_sas SCSI driver crashes systems when a local user triggers a host scan via sysfs. Authenticated local users with low privileges can write to the sysfs scan interface, causing kernel oops due to a channel iteration bug introduced in commit 37c4e72b0651 - the driver supports only one channel (channel 0) but its max_channel is set to 1, causing sas_user_scan() to attempt scanning channel 1 where no valid SAS device structure exists. The result is a denial-of-service via kernel NULL pointer dereference at sas_find_dev_by_rphy(). No public exploit or CISA KEV listing has been identified; EPSS is 0.02% (5th percentile), consistent with low-likelihood opportunistic exploitation.

NULL pointer dereference in the Linux kernel's ASoC QCOM QDSP6 subsystem crashes systems built on Qualcomm SA8775P and SC8280XP SoCs during ADSP protection-domain restart cycles. The crash occurs because the q6apm-audio .remove callback prematurely deletes Runtime Descriptions (RTDs) containing q6apm DAI components during ASoC teardown, leaving those components still linked to the sound card and triggering a kernel oops on the subsequent rebind. Impact is limited to availability (kernel panic/denial of service); no public exploit has been identified at time of analysis, and EPSS at 0.02% reflects very low widespread exploitation probability.

NULL pointer dereference in the Linux kernel's stratix10-rsu firmware driver triggers a kernel panic (denial of service) on Intel/Altera SoCFPGA Stratix 10 systems running kernel 6.19.x when RSU is disabled in the First Stage Boot Loader. A local authenticated user can cause a full system crash by triggering the svc_normal_to_secure_thread kernel thread, which dereferences an already-freed service channel pointer. No public exploit identified at time of analysis; EPSS score of 0.02% at the 5th percentile reflects the narrow hardware-specific exposure.

Kernel crash (page fault) in the Linux kernel's kprobes subsystem allows a local authenticated user to trigger a system denial-of-service by removing a module containing kprobe probes after ftrace has been killed due to prior errors. The affected code path in kprobes_module_callback does not check the kprobe_ftrace_disabled flag set by ftrace_kill(), causing invalid memory access traceable via KASAN at address fffffbfff805000d. No active exploitation has been confirmed; EPSS is 0.02% (5th percentile), reflecting the niche preconditions required.

NULL pointer dereference in the Linux kernel's intel_pstate cpufreq driver crashes systems booted with the 'nosmt' parameter when CPU QoS requests are processed for SMT sibling threads. On 'nosmt'-booted systems, all_cpu_data[cpu] is NULL for disabled SMT siblings; update_cpu_qos_request() dereferences cpudata->pstate.turbo_freq before validating the policy pointer, producing a kernel panic and local denial of service. EPSS at 0.02% (4th percentile) reflects very low exploitation probability, no public exploit code has been identified, and no CISA KEV listing exists at time of analysis.

A NULL pointer dereference in Linux kernel AMD GPU driver cleanup code causes local denial of service when GPU initialization fails on systems with unsupported AMD hardware blocks. Local authenticated users with low privileges can trigger kernel crashes during device teardown sequences. The vulnerability affects multiple stable kernel versions (6.18.16-6.18.19, 6.19.6-6.19.9) with patches available from upstream. EPSS score of 0.02% (4th percentile) indicates very low observed exploitation probability, and no active exploitation or public exploits are confirmed. Real-world impact is limited to systems with specific AMD GPU hardware experiencing initialization failures, making this primarily a reliability issue rather than a direct security threat.

Null pointer dereference in Linux kernel's AMD DRM driver causes system crash during device cleanup on unsupported hardware. The flaw (CWE-476) affects multiple 6.18.x and 6.19.x kernel versions, allowing local authenticated users to trigger denial of service through AMD GPU driver initialization or cleanup operations. Patches available via kernel stable tree commits with EPSS score of 0.02% indicating minimal exploitation likelihood. No active exploitation or public POC identified at time of analysis.

NULL pointer dereference in Linux kernel's ublk driver allows local authenticated users to crash the system by sending UBLK_CMD_UPDATE_SIZE to a device before it starts or after it stops. The vulnerability exists in ublk_ctrl_set_size() which unconditionally dereferences ub->ub_disk without validating the device state, triggering a kernel panic and causing a denial of service. Patches are available from the Linux kernel maintainers for versions 6.18.20, 6.19.9, and 7.0. EPSS score of 0.02% (4th percentile) indicates low observed exploitation probability, consistent with the local-only attack vector and absence from CISA KEV.

A NULL pointer dereference in the Linux kernel's adis_init() function causes kernel crashes when initializing ADIS IMU drivers (adis16480, adis16490, adis16545). The function attempts to dereference adis->ops without first verifying it is non-NULL, triggering denial of service on affected systems during device probe. Exploitation requires local access with low privileges (CVSS AV:L/AC:L/PR:L). EPSS score of 0.02% (4th percentile) indicates minimal real-world exploitation likelihood. Vendor patches available across multiple stable kernel versions (6.19.9, 6.18.19, 7.0).

NULL pointer dereference in the Linux kernel's AMD display driver (DRM subsystem) allows local authenticated users to crash the system via dcn401_init_hw() function. Affects kernel 6.12 through 7.0-rc6, specifically the DCN 4.01 hardware sequencer in amdgpu driver. Vendor patches available for stable branches (6.18.22, 6.19.12, 7.0). EPSS exploitation probability is very low (0.02%, 4th percentile), indicating minimal real-world threat despite moderate CVSS score. Not listed in CISA KEV, and no public exploit code identified at time of analysis.

Null pointer dereference in Linux kernel's Qualcomm SM8450 interconnect driver causes local denial of service during device probe. The vulnerability affects Linux kernel 6.19.x through 7.0-rc6 on Qualcomm SM8450 platforms when the interconnect driver initializes. Upstream patches are available (commits 77d22bf3fc5d and dbbd550d7c8d). EPSS score of 0.02% indicates very low observed exploitation probability, and no active exploitation or public POC has been identified. Real-world risk is limited to local authenticated users on affected Qualcomm SoC platforms during driver initialization.

Kernel NULL pointer dereference in Linux kernel's BPF verifier allows local authenticated users to trigger a denial of service. The vulnerability stems from improper handling of nullable PTR_TO_BUF pointers in check_mem_access(), where map iterator callbacks can dereference NULL ctx->key or ctx->value pointers without validation, causing a kernel crash. Affects Linux kernel versions 5.17 through 7.0-rc4, with patches available across stable branches (5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12, 7.0). EPSS score of 0.02% (7th percentile) indicates very low probability of exploitation in the wild, and no evidence of public exploit code or active exploitation exists. Local access with low privileges required makes this a targeted risk rather than widespread threat.

NULL pointer dereference in Linux kernel ACPI processor module allows local authenticated attackers to crash the system. The flaw occurs in acpi_processor_errata_piix4() when device lookup logic overwrites a valid pointer with NULL, triggering a crash when accessed by dev_dbg(). Vendor-released patches are available across multiple stable kernel branches (5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6, 7.0). EPSS exploitation probability is very low (0.02%, 7th percentile), and no public exploit or active exploitation has been identified. The vulnerability requires local access with low privileges (CVSS AV:L/PR:L), making it a lower priority than network-exposed flaws despite the high availability impact.

Null-pointer dereference in the Linux kernel DRM panel driver (jdi_panel_dsi_remove function) allows local authenticated attackers to cause a denial of service by triggering device removal when the jdi structure is NULL. The vulnerability exists because the function checks for NULL but fails to return early, allowing subsequent code to dereference the NULL pointer. CVSS score is 5.5 (local attack vector, low complexity); EPSS indicates low exploitation probability (0.02%, 5th percentile), and no public exploit code or active exploitation has been confirmed.

Local denial-of-service in Linux kernel's Rockchip RGA media driver allows authenticated users with low privileges to crash the system through NULL pointer dereference. The vulnerability affects kernel versions 6.8+ containing the Rockchip RGA driver, where rga_buf_init() fails to validate ERR_PTR returns from rga_get_frame() before dereferencing frame size. Vendor patches available across stable branches (6.12.75, 6.18.16, 6.19.6). EPSS score 0.02% (5th percentile) indicates minimal real-world exploitation likelihood, consistent with local-only attack vector requiring authenticated access.

PHP 8.2.31 addresses a null pointer dereference vulnerability (CVE-2026-7262) that can cause denial of service through remote network access without authentication. The vulnerability has a low CVSS score of 2.9 due to attack complexity factors, but the vendor has released PHP 8.2.31 as an immediate security patch addressing this and seven related CVEs. All PHP 8.2 users should upgrade to mitigate the impact.

Null pointer dereference in PHP 8.2.x causes denial of service through remote attacks requiring user interaction and persistent attack timing. CVE-2026-7259 is one of eight vulnerabilities patched in PHP 8.2.31, with a low CVSS score (2.1) reflecting the attack complexity and limited availability impact, though the null pointer dereference class (CWE-476) can escalate in severity depending on code context. No public exploit code or active exploitation has been identified at time of analysis.

Tor before version 0.4.9.7 crashes due to a NULL pointer dereference when CERT cells are received out of order, causing denial of service against relay nodes and clients. Remote unauthenticated attackers on the network can trigger this crash by sending malformed cell sequences, disabling affected Tor instances. No active exploitation confirmed, but the vulnerability affects core protocol handling in all affected versions.

Null pointer dereference in the Linux kernel's buffer cache subsystem (`fs/buffer.c`) can cause a kernel panic, resulting in a local denial of service. The flaw is triggered when `try_to_free_buffers()` calls `drop_buffers()` on a folio that has no buffer heads attached - a condition reachable when `filemap_release_folio()` is invoked on a mapping with `AS_RELEASE_ALWAYS` set but no `release_folio` operation defined. No public exploit has been identified and the EPSS score of 0.02% (7th percentile) confirms negligible observed exploitation activity; patched stable kernel releases are available across multiple branches.

Null pointer dereference in the AMD GPU (amdgpu) DRM subsystem can cause denial of service when the SDMA block is disabled and buffer_funcs initialization is skipped, allowing local authenticated users to crash the kernel via uninitialized function pointer access.

NULL pointer dereference in the Linux kernel's amdgpu RAS (Reliability, Availability, and Serviceability) driver crashes the kernel when a local user reads the sysfs badpages interface on a system whose AMD GPU EEPROM contains only invalid address entries. The driver skips RAS data allocation under this condition, and the subsequent read of `amdgpu_ras_sysfs_badpages_read` dereferences the uninitialized pointer, producing a kernel panic and complete denial of service. No public exploit exists and no active exploitation has been identified; EPSS is 0.02% (4th percentile), reflecting very low real-world risk.

Null pointer dereference in the Linux kernel's bcm_vk misc driver allows a local authenticated attacker to crash the kernel, resulting in a denial of service. The bcm_vk_read() function checks whether the 'entry' pointer is NULL but fails to prevent subsequent dereferences of that pointer when rc is set to -EMSGSIZE, leading to a kernel panic. No public exploit exists and the vulnerability is not listed in CISA KEV; however, vendor-released patches are available across multiple stable kernel branches, and Red Hat and SUSE have tagged this for attention in their ecosystems.

Null pointer dereference in the Linux kernel QRTR (Qualcomm IPC Router) driver via MHI auto_queue feature causes denial of service on Qualcomm X1E80100 CRD machines during boot. The vulnerability occurs when the MHI stack invokes the DL (downlink) callback before the QRTR client driver is fully probed, accessing uninitialized driver structures. A local privileged attacker can trigger kernel panic by exploiting the race condition between MHI buffer auto-queuing and driver initialization, affecting systems relying on QRTR over MHI transport.

NULL pointer dereference in the Linux kernel's RDMA/ionic driver allows a local low-privileged user to crash the kernel by triggering the `ionic_query_port()` function when the associated network device is unavailable. The root cause is an unchecked return value from `ib_device_get_netdev()`, which can return NULL during device absence or hot-unplug transitions - leading to a kernel panic and complete denial of service. No public exploit has been identified at time of analysis, and the EPSS score of 0.02% (4th percentile) confirms this is not being actively targeted.

Uninitialized pointer dereference in the Linux kernel ring-buffer subsystem crashes the kernel, enabling a local low-privileged user to cause a denial of service. The function `rb_meta_validate_events()` fails to initialize `head_page` before error-handling code at the `invalid` label dereferences it during reader page validation failure. No public exploit exists and EPSS places this at the 4th percentile, but vendor-released patches are available in stable branches 6.18.16, 6.19.6, and 7.0.

NULL pointer dereference in the Linux kernel md-cluster subsystem allows a local low-privileged user to crash the system during a narrow race window in MD array startup. The process_metadata_update() function blindly dereferences mddev->thread before it is initialized, which becomes reachable if a remote cluster peer sends a METADATA_UPDATED message after bitmap_load() starts the recv_daemon but before mddev->thread is assigned in md_run(). No public exploit has been identified at time of analysis, and EPSS probability is 0.02% (5th percentile), consistent with a niche, timing-dependent local DoS.

NULL pointer dereference in the Linux kernel HID prodikeys driver allows a local attacker with USB access to crash the kernel by presenting a crafted USB device that impersonates a Creative Prodikeys PC-MIDI controller. When the fake device's HID report descriptors bypass the input_mapping() callback, pm->input_ep82 remains NULL; subsequent dereference of that pointer causes a kernel panic, resulting in a complete availability loss. No public exploit or active exploitation has been identified; EPSS is 0.02% (7th percentile), consistent with the local-only, denial-of-service-only impact profile.

Denial of service in the Linux kernel's net subsystem via deadlock in skb_may_tx_timestamp() when socket timestamp completion occurs in interrupt context while sk_callback_lock is write-locked, affecting local attackers with user privileges on systems with network drivers that complete TX timestamps from dedicated interrupt handlers.

Out-of-bounds write in the Linux kernel's clk/rs9 clock driver corrupts kernel memory on systems equipped with the Renesas 9FGV0841 clock chip, reliably crashing the kernel during driver unbind or suspend. The rs9_driver_data structure allocated only 4 slots for clk_hw pointers but the 9FGV0841 exposes 8 outputs, so registering outputs 4-7 silently overwrites adjacent kernel memory. No public exploit exists and no active exploitation is confirmed (not in CISA KEV); EPSS is 0.02% (5th percentile), reflecting the hardware-specific and local-only attack surface.

NULL pointer dereference in the Linux kernel's ixp4xx Ethernet driver (net/ethernet/xscale) crashes the kernel on Intel IXP4xx-based embedded systems when PTP timestamp queries are made against non-ixp46x hardware. A local authenticated user on affected hardware can trigger a kernel panic simply by running standard tools such as tcpdump or ethtool, causing a full system crash. No active exploitation is confirmed (EPSS 0.02%, no CISA KEV listing), and real-world impact is constrained to legacy IXP4xx-based embedded devices such as OpenWrt-capable routers.

Null pointer dereference in the Linux kernel's rtl8723bs staging Wi-Fi driver allows a locally authenticated user to crash the kernel, resulting in a denial of service. The `pwlan` variable in `find_network()` is not validated for NULL before being passed to `rtw_free_network_nolock()`, which then dereferences it unconditionally. The flaw has been present since Linux 4.12 and is patched across all active stable branches; no public exploit exists and EPSS sits at 0.02%, confirming negligible exploitation activity.

NULL pointer dereference in the Linux kernel's powerpc/smp subsystem allows a local authenticated user to crash the kernel, causing a denial of service on PowerPC-based systems. The `parse_thread_groups()` function passes the return value of `kcalloc()` directly to `of_property_read_u32_array()` without validating it for NULL, meaning a failed memory allocation - possible under memory pressure - leads to a kernel panic or oops. No public exploit code exists and this vulnerability is not in CISA KEV; with an EPSS of 0.02% (7th percentile) and architecture-specific scope limited to PowerPC, real-world exploitation risk is low but relevant to IBM POWER server deployments running Red Hat or SUSE Linux.

Kernel oops (crash) in the Linux kernel brcmfmac SDIO Wi-Fi driver allows a local low-privileged user to cause a denial-of-service by triggering a probe failure on Broadcom SDIO Wi-Fi hardware. The root cause is a double-assignment of sdiodev->bus across brcmf_sdio_probe() and brcmf_sdiod_probe(), leaving an invalid (non-NULL, error-valued) pointer that brcmf_sdio_remove() later dereferences during cleanup. No public exploit has been identified, EPSS is at the 4th percentile, and this is not listed in CISA KEV; risk is primarily a kernel stability concern in specific hardware configurations.

NULL pointer dereference in the Linux kernel's HID magicmouse driver allows a local attacker with low privileges to crash the kernel by connecting a crafted USB device that impersonates an Apple Magic Mouse. When a fake USB device provides a custom report descriptor, the input_mapping() hook is never called, leaving msc->input as NULL; subsequent access in input_configured() causes a kernel panic and complete availability loss. No public exploit exists and EPSS is negligible at 0.02% (7th percentile), but the impact is a full system denial of service when exploitation conditions are met.

NULL pointer dereference in the Linux kernel's ASoC SOF Intel HDA audio subsystem crashes the kernel when DAI link topology mismatches occur. The function hda_dai_get_ops in the snd_sof_intel_hda_common module dereferences an uninitialized widget pointer - particularly during loopback capture echo reference operations using dummy DAI links with a broken topology. A local low-privileged user on an affected Intel SOF HDA system can trigger a kernel panic, causing a denial of service. No active exploitation has been identified (EPSS 0.02%, 5th percentile, no CISA KEV listing), and patches are available in multiple stable kernel branches.

Null pointer dereference in the Linux kernel AMD power management (drm/amd/pm) subsystem causes denial of service when SMU (System Management Unit) is disabled during RAS (Reliability, Availability, and Serviceability) initialization. Local authenticated attackers with low privileges can trigger this crash on affected systems, resulting in kernel panic and system unavailability. EPSS exploitation probability is very low (0.02%), indicating this requires specific configuration and local access.

Denial of service via null pointer dereference in Linux kernel's pstore persistent storage subsystem occurs when the vmap() function fails but the persistent_ram_vmap() function incorrectly returns success if a non-zero offset is present, allowing subsequent buffer access to dereference invalid memory and cause system crashes. Affects Linux kernel versions prior to 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6, and 7.0. No public exploit identified at time of analysis, but vendor-released patches are available across multiple stable branches.

NULL pointer dereference in the Linux kernel framebuffer console (fbcon) subsystem allows a local low-privilege user to crash the system. The function con2fb_acquire_newinfo() fails to check the return value of fbcon_open(); when fbcon_open() fails, info->fbcon_par remains NULL and is subsequently dereferenced, triggering a kernel panic. Patches are available across all active stable branches (5.15.x through 7.0), EPSS is 0.02% at the 7th percentile, and no confirmed active exploitation is recorded in CISA KEV.

NULL pointer dereference in the Linux Kernel ACPI processor subsystem crashes the host system when the cpuidle driver initialization path is invoked in an inconsistent state. Affected kernel builds introduced this regression after commit 7a8c994cbb2d relocated ACPI idle driver registration, leaving the check in `__acpi_processor_start()` referencing a driver that no longer exists at that point in initialization; `__cpuidle_register_device()` then dereferences a NULL pointer, triggering a kernel panic. No public exploit has been identified and EPSS stands at 0.02% (4th percentile), consistent with a reliability regression rather than a targeted attack.

Null pointer dereference in Linux kernel bridge VLAN filtering code allows local authenticated attackers to trigger a denial of service via a crafted RTM_NEWLINK netlink message with BR_BOOLOPT_FDB_LOCAL_VLAN_0 flag when CONFIG_BRIDGE_VLAN_FILTERING is disabled. The vulnerability occurs because br_fdb_delete_locals_per_vlan_port() and br_fdb_insert_locals_per_vlan_port() dereference a NULL vlan group pointer without validation, causing a kernel panic. No public exploit code identified at time of analysis.

NULL pointer dereference in the Linux kernel ixgbevf driver crashes Hyper-V guest VMs during device probe, causing a kernel panic and complete denial of service. The regression was introduced when commit a7075f501bd3 added a .negotiate_features callback to ixgbe_mac_operations and populated it for the standard ops table (ixgbevf_mac_ops) but omitted it from the Hyper-V-specific table (ixgbevf_hv_mac_ops), leaving that pointer NULL on Hyper-V guests. Any Linux system running on Microsoft Hyper-V with an Intel ixgbevf virtual NIC is subject to an automatic kernel crash at module load or boot; no public exploit has been identified at time of analysis and EPSS is 0.02%, reflecting a narrow but reliable impact on the specific deployment combination.

NULL pointer dereference in the Linux kernel IPVS subsystem causes a kernel panic during IPVS service creation failure cleanup, resulting in a full host denial of service. Affected kernels from 6.2 onward contain a logic error in ip_vs_add_service() where a successful scheduler bind sets the local sched variable to NULL; if ip_vs_start_estimator() subsequently fails, the error path calls ip_vs_unbind_scheduler() with that NULL pointer, dereferencing offset 0x30 and triggering a general protection fault. Exploitation requires local authenticated access with CAP_NET_ADMIN privileges; no public exploit is identified and EPSS is 0.02%, indicating very low exploitation probability.

Denial of service via nil pointer dereference in Argo Workflows 4.0.0-4.0.4 affects SSO users with RBAC namespace delegation enabled when their identity claims match a namespace-level RBAC rule but not an SSO-namespace rule. The gatekeeper.go rbacAuthorization() function unconditionally dereferences a nil serviceAccount pointer when comparing rule precedence, causing an HTTP 500 panic on every API request from the affected user. Live-tested exploit confirmed on v4.0.4 with Dex OIDC provider; vendor patch released as v4.0.5.

Denial of service in Incus daemon via nil pointer dereference when restoring backup archives with valid inline backup/index.yaml but malformed legacy backup/container/backup.yaml omitting the container section. An authenticated user with backup import permissions can crash the daemon by crafting a backup archive that passes preflight validation but triggers nil dereference during the restore phase after archive extraction. CVSS 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) - confirmed by 7asecurity with proof-of-concept test cases.

Nil-pointer dereference in Incus daemon S3 storage bucket import allows authenticated users to crash the daemon by uploading a truncated or corrupted tar backup file. The TransferManager.UploadAllFiles function fails to handle non-EOF errors from tar parsing, causing a panic when hdr is nil. Vendor-released patch available in v7.0.0.

Null pointer dereference in mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows unauthenticated remote attackers to crash child processes in caching forward proxy configurations, resulting in denial of service. The vulnerability has CVSS 5.3 (medium) with network accessibility and no authentication required, but is limited to partial availability impact affecting only specific proxy deployments. Vendor-released patch: version 2.4.67.

Mutt mail client before version 2.3.2 crashes due to a null pointer dereference in the show_sig_summary function when processing GPG signatures, causing denial of service. The vulnerability requires local access and user interaction to trigger (viewing a malicious email with a crafted signature), resulting in application termination with minimal real-world impact. CVSS score of 2.5 reflects low severity; no public exploit or active exploitation confirmed.

Denial of service vulnerability in Assimp 6.0.2 via null pointer dereference in FBXMeshGeometry.cpp MeshGeometry constructor allows remote attackers to crash applications processing malicious FBX files. Requires user interaction (opening/processing a crafted file) but affects any application using the vulnerable library version. Publicly available exploit code exists; CVSS 6.5 reflects network attack vector with user interaction requirement.

Null pointer dereference in Telegram Desktop up to version 6.7.5 allows remote attackers without authentication to cause denial of service by crafting a malicious login_url argument in the Bot API RequestButton function. The vulnerability requires user interaction to click a malicious link and has a public exploit disclosure, though vendor response to early disclosure notification was not forthcoming.

Wireshark 4.6.0 through 4.6.4 crashes when processing malformed IEEE 802.11 frames due to a null pointer dereference in the protocol dissector. An attacker can trigger denial of service by crafting or replaying a specially malformed wireless packet that causes the dissector to crash when analyzed, rendering packet analysis impossible until the application restarts. CVSS score 5.5 reflects local attack vector with user interaction required; no public exploit code has been identified at time of analysis.

Local denial-of-service in the Linux kernel's vidtv virtual DVB media driver allows an authenticated local user to crash the kernel via a NULL pointer dereference triggered by uninitialized struct fields in vidtv_ts_null_write_into() and vidtv_ts_pcr_write_into(). Affected kernel versions span from commit f90cf6079bf6 across multiple stable branches through Linux 5.10, with fixes backported to 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0.1, and 7.1-rc1. No public exploit identified at time of analysis, EPSS is 0.02% (7th percentile), and this CVE is not listed in the CISA KEV catalog, reflecting its low real-world exploitation likelihood.

Denial of service in the Linux kernel AF_ALG crypto interface allows local authenticated attackers to trigger a NULL pointer dereference and kernel panic by sending sequential sendmsg() calls that cause scatter-gather list chain operations to fail to properly unmark SGL boundaries. The vulnerability occurs when AF_ALG allocates chained SGL structures without clearing end markers on previous entries, causing the crypto scatterwalk to encounter premature termination and dereference NULL pointers. CVSS 5.5 (AV:L/AC:L/PR:L) reflects local-only attack requirement with low complexity; EPSS 0.02% (7th percentile) indicates minimal real-world exploitation risk despite kernel panic severity.

Null pointer dereference in Linux kernel net/mlx5 LAG (Link Aggregation) driver allows local authenticated attackers to cause denial of service by accessing debugfs interfaces when LAG device context is invalid. The vulnerability exists in mlx5_ldev_add_debugfs() which creates debugfs entries without validating that a valid LAG context exists, exposing the members file and other interfaces that depend on a valid ldev pointer. EPSS exploitation probability is 0.02% (percentile 7%), indicating low real-world exploitation likelihood despite the vulnerability's availability for patching.

Denial of service via null pointer dereference in Linux kernel gpio-qixis-fpga driver affects local users with limited privileges. The driver incorrectly checks for NULL return value from devm_regmap_init_mmio(), which returns ERR_PTR() on failure, allowing a local attacker with user-level privileges to trigger a kernel panic by causing improper error handling. EPSS score is low (0.02%), indicating limited exploitation probability despite CVSS 5.5 severity.

Kernel NULL pointer dereference in AMD GPU driver on systems with 64KB page sizes allows local authenticated attackers to crash the system by triggering memory allocation mismatches between reserved trap area (8KB) and required allocation size (128KB) during GPU memory initialization. The vulnerability affects systems running ROCm workloads and causes denial of service when executing rocminfo or rccl unit tests on IBM POWER10 and similar 64K-page architectures. EPSS exploitation probability is very low (0.02%), and no public exploit code or active in-the-wild exploitation has been identified.

Denial of service via NULL pointer dereference in the Linux kernel USB Cadence 3 (cdns3) gadget driver when ep_queue is called on disabled or unconfigured endpoints. A local authenticated attacker can trigger a kernel crash by invoking the vulnerable code path on systems with cdns3 USB gadget support enabled. No public exploit code has been identified, but the attack requires only local access and low privileges (CVSS 5.5, EPSS 0.02%).

NULL pointer dereference in the Linux kernel's auxdisplay line-display driver (linedisp_release()) causes a local denial of service through a kernel panic. The flaw exists because linedisp_release() relies on to_linedisp() - which depends on the device attachment list - but that attachment may already be removed before put_device() invokes the release callback, causing a NULL dereference during resource cleanup. Triggered from linedisp_unregister() or linedisp_register() error paths, exploitation requires local low-privilege access on a system running the auxdisplay module. No public exploit exists and EPSS is 0.02% (5th percentile), confirming this as a stability fix with minimal real-world security urgency.

Null pointer dereference and invalid I/O port writes in the Linux kernel's comedi ni_atmio16d driver occur when the device attach handler fails, causing the detach handler to call reset_atmio16d() with uninitialized device state. Local privileged attackers can trigger a denial of service by causing attach to fail, resulting in kernel memory access violations or writes to address zero. No public exploit code or active exploitation has been identified; patch versions are available from the Linux kernel stable branches.

Denial of service in Linux kernel energy model netlink handler allows local authenticated attackers to crash the system via NULL pointer dereference when requesting non-existent performance domain IDs. The dev_energymodel_nl_get_perf_domains_doit() function fails to validate the return value from em_perf_domain_get_by_id() before dereferencing the performance domain structure, causing immediate kernel panic when an invalid domain ID is supplied. EPSS exploitation probability is very low (0.02%, 5th percentile), and no public exploit code or active exploitation has been identified.

Denial of service via NULL pointer dereference in the MediaTek Ethernet PPE (packet processing engine) driver occurs when gmac0 (the primary ethernet interface) is disabled on affected systems. A local authenticated attacker can trigger a kernel crash by sending traffic through the networking stack when the driver incorrectly checks for a valid ingress device without verifying if the first network device pointer is actually initialized. The vulnerability affects Linux kernel versions prior to fixes released in stable branches 6.18.22, 6.12.81, 6.19.12, and 7.0.

NULL pointer dereference in the USB Ethernet gadget driver (u_ether) allows local attackers with low privileges to cause a denial of service by querying device information via ethtool during device unbind. The vulnerability occurs when userspace tools call eth_get_drvinfo() on a gadget interface after the kernel has cleared the gadget pointer during device reparenting, triggering a crash without authentication or user interaction. EPSS exploitation probability is minimal (0.02%), and this is a localized denial of service with no impact on confidentiality or integrity.

A NULL pointer dereference in the Linux kernel USB gadget UVC (USB Video Class) driver during power management transitions allows local authenticated attackers with low privileges to cause a kernel panic and denial of service. The vulnerability occurs when the PM subsystem freezes user space processes during suspend, causing wait_event_interruptible_timeout() to abort early in uvc_function_unbind(), which nullifies the gadget pointer. When tasks are restarted, the V4L2 release path attempts to access the already nullified pointer, triggering a kernel panic. Patches are available across multiple kernel versions (5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12, 7.0).

Denial of service in Wireshark 4.6.0 through 4.6.4 via null pointer dereference in the RTSP protocol dissector causes application crash when processing malformed RTSP traffic. Local attackers with network access to a Wireshark instance can trigger the crash by supplying a specially crafted RTSP packet, resulting in availability impact. No public exploit code or active in-the-wild exploitation has been identified; patch availability status requires verification from vendor.

Null pointer dereference in Wireshark sharkd 4.4.0-4.4.14 and 4.6.0-4.6.4 causes denial of service when processing crafted input, crashing the daemon. Local attackers with low privileges can trigger the crash via user interaction, rendering the packet analysis service unavailable. No authentication required, and publicly available exploit code does not appear to exist at time of analysis.

Denial of service in the Linux kernel EDAC (Error Detection and Correction) subsystem due to improper initialization ordering in edac_mc_alloc(). When memory allocation fails during EDAC memory controller initialization, the error path calls put_device() before device_initialize() is executed, triggering a null pointer dereference in kobject_put() that causes a kernel panic or system crash. This affects Linux systems with EDAC support enabled across multiple kernel versions from 5.19 through 7.0.

NULL pointer dereference in the Linux kernel vub300 USB MMC driver allows a local authenticated attacker to crash the kernel by disconnecting a VUB300-based USB MMC adapter while the driver is active. The disconnect handler releases the driver data reference before deregistering the MMC controller, creating a window for NULL dereference or use-after-free that results in a kernel panic and denial of service. No active exploitation has been confirmed - EPSS is 0.02% (7th percentile) and the vulnerability is absent from the CISA KEV catalog.

Null pointer dereference in the Linux kernel's lan966x FDMA network driver crashes the kernel when page_pool_create() fails during receive pool initialization. Affected systems running lan966x network controller hardware can be brought down by a local low-privileged user who triggers a page pool allocation failure, resulting in a kernel oops via dereference of an ERR_PTR in xdp_rxq_info_reg_mem_model(). No public exploit or active exploitation (CISA KEV) has been identified; EPSS at 0.02% (5th percentile) confirms negligible observed exploitation activity.

NULL pointer dereference in the Linux kernel hid-alps driver crashes systems with Alps HID touchpad hardware when raw events are processed before the device is fully claimed. Local low-privileged users on affected systems can trigger a kernel panic, causing a denial of service. No public exploit exists (EPSS 0.02%, 5th percentile) and no KEV listing has been issued; however, patches are confirmed across multiple stable branches including 6.12.83, 6.18.24, 6.19.14, and 7.0.1.

Null pointer dereference in the ALSA TASCAM US-144MKII USB audio driver allows local attackers with physical access to a malicious USB device to cause a kernel panic and denial of service. The vulnerability exists because the driver fails to validate that USB interface 0 exists before dereferencing it, and attackers can craft a malicious USB configuration that includes only interface 1, triggering the crash when the device is connected.

Null pointer dereference in the Renesas USB3 gadget driver allows local authenticated attackers to trigger a denial of service by sending crafted USB standard requests with invalid endpoint indices that bypass validation in GET_STATUS and SET/CLEAR_FEATURE handlers. The vulnerability affects multiple stable kernel versions and requires local access with user-level privileges, resulting in potential system crash or service disruption.

NULL pointer dereference in the Linux kernel's vidtv virtual DVB-T test driver allows a local low-privileged user to crash the kernel, resulting in a denial-of-service. The flaw resides in vidtv_channel_pmt_match_sections(), which calls vidtv_psi_pmt_stream_init() without validating whether the return value is NULL on memory allocation failure; a subsequent field access on the NULL pointer triggers a general protection fault. No public exploit or active KEV-listed exploitation exists; EPSS at 0.02% (5th percentile) reflects negligible real-world exploitation probability.

Null pointer dereference in the Linux kernel's KVM SEV subsystem crashes the host with a kernel panic when a low-privileged local user issues a specific ioctl sequence. The missing `kvm->lock` acquisition before the `sev_guest()` check in `sev_mem_enc_register_region()` allows exploitation when `KVM_SEV_INIT{2}` fails and leaves `sev->regions_list` uninitialized - a subsequent `KVM_MEM_ENCRYPT_REG_REGION` ioctl then dereferences the null list head. No confirmed active exploitation (not in CISA KEV), but a syzbot-generated reproducer is embedded in the CVE description; EPSS is 0.02% (4th percentile), consistent with the local-only, denial-of-service nature. Patched kernel versions 6.18.24, 6.19.14, and 7.0.1 are available.

Deadlock in the Linux kernel WireGuard subsystem can cause a hung task and system-level denial of service for authenticated local users. The `wg_netns_pre_exit()` pernet callback manually acquires `rtnl_lock()`, blocking indefinitely if `rtnl_mutex` is concurrently held by the `cleanup_net` workqueue or `setup_net` failure rollback path. No public exploit exists and EPSS is extremely low (0.02%, 4th percentile); however, the issue spans a broad range of kernel versions and has been patched in stable releases 6.18.24, 6.19.14, and 7.0.1.

NULL pointer dereference in the Linux kernel's nilfs2 filesystem driver allows a local, low-privileged attacker to crash the kernel by invoking the NILFS_IOCTL_CLEAN_SEGMENTS ioctl immediately after mounting a nilfs2 filesystem, before the DAT inode's btree node cache is lazily initialized. The impact is a general protection fault and full denial of service; no confidentiality or integrity impact is possible. No public exploit is known at time of analysis, and EPSS at 0.02% (5th percentile) reflects extremely low real-world exploitation probability.

NULL pointer dereference in the Linux kernel's MediaTek DSI DRM driver causes a kernel panic during module initialization on ARM64 systems with MediaTek display hardware. The crash occurs because `mipi_dsi_host_register` triggers the `mtk_dsi_bind` callback before the `mtk_dsi` struct is stored in driver data, dereferencing a NULL pointer inside `drm_mode_object_add` and acquiring `mode_config.idr_mutex` before panicking - blocking all subsequent DRM operations on the system. No public exploit exists and EPSS stands at 0.02%, consistent with a hardware-specific local denial-of-service with no confidentiality or integrity impact.

Null pointer dereference in the Linux kernel's LoongArch architecture code can crash the kernel during early boot when kstrdup() fails to allocate memory while parsing CPU model strings from the device tree. Affected systems running unpatched kernels on LoongArch hardware may experience a kernel oops and complete system unavailability if memory is exhausted at boot time. No public exploit exists and EPSS is 0.02% (6th percentile), reflecting very low exploitation probability; this is not listed in CISA KEV.