Denial of Service
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
How It Works
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions. Attackers exploit asymmetry: minimal attacker effort produces disproportionate resource consumption on the target. Application-level attacks use specially crafted inputs that trigger expensive operations—a regex engine processing malicious patterns can backtrack exponentially, or XML parsers recursively expand entities until memory exhausts. Network-level attacks flood targets with connection requests or amplify traffic through reflection, but application vulnerabilities often provide the most efficient attack surface.
The attack typically begins with reconnaissance to identify resource-intensive operations or unprotected endpoints. For algorithmic complexity attacks, adversaries craft inputs hitting worst-case performance—hash collision inputs filling hash tables with collisions, deeply nested JSON triggering recursive parsing, or pathological regex patterns like (a+)+b against strings of repeated 'a' characters. Resource exhaustion attacks open thousands of connections, upload massive files to unbounded storage, or trigger memory leaks through repeated operations. Crash-based attacks target error handling gaps: null pointer dereferences, unhandled exceptions in parsers, or assertion failures that terminate processes.
Impact
- Service unavailability preventing legitimate users from accessing applications during attack duration
- Revenue loss from downtime in e-commerce, SaaS platforms, or transaction processing systems
- Cascading failures as resource exhaustion spreads to dependent services or database connections pool out
- SLA violations triggering financial penalties and damaging customer trust
- Security team distraction providing cover for data exfiltration or intrusion attempts running concurrently
Real-World Examples
CVE-2018-1000544 in Ruby's WEBrick server allowed ReDoS through malicious HTTP headers containing specially crafted patterns that caused the regex engine to backtrack exponentially, freezing request processing threads. A single attacker could saturate all available workers.
Cloudflare experienced a global outage in 2019 when a single WAF rule containing an unoptimized regex hit pathological cases on legitimate traffic spikes. The .*(?:.*=.*)* pattern exhibited catastrophic backtracking, consuming CPU cycles across their edge network until the rule was disabled.
CVE-2013-1664 demonstrated XML bomb vulnerabilities in Python's XML libraries. Attackers uploaded XML documents with nested entity definitions-each entity expanding to ten copies of the previous level. A 1KB upload could expand to gigabytes in memory during parsing, crashing applications instantly.
Mitigation
- Strict input validation enforcing size limits, complexity bounds, and nesting depth restrictions before processing
- Request rate limiting per IP address, API key, or user session with exponential backoff
- Timeout enforcement terminating operations exceeding reasonable execution windows (typically 1-5 seconds)
- Resource quotas limiting memory allocation, CPU time, and connection counts per request or tenant
- Regex complexity analysis using linear-time algorithms or sanitizing patterns to eliminate backtracking
- Circuit breakers automatically rejecting requests when error rates or latency thresholds indicate degradation
- Load balancing and autoscaling distributing traffic across instances with automatic capacity expansion
Recent CVEs (40036)
In the Linux kernel, the following vulnerability has been resolved: slab: ensure slab->obj_exts is clear in a newly allocated slab page ktest recently reported crashes while running several buffered. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Fix workqueue crash in cma_netevent_work_handler struct rdma_cm_id has member "struct work_struct net_work" that is. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: drm/imagination: take paired job reference For paired jobs, have the fragment job take a reference on the geometry job, so that the. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
NVIDIA vGPU software for Windows and Linux contains a vulnerability in the Virtual GPU Manager (vGPU plugin), where it allows a guest to access global resources. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
NVIDIA GPU Display Driver for Linux contains a vulnerability which could allow an unprivileged attacker to escalate permissions. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Uncontrolled Resource Consumption in Elasticsearch while evaluating specifically crafted search templates with Mustache functions can lead to Denial of Service by causing the Elasticsearch node to. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.
In the Linux kernel, the following vulnerability has been resolved: ublk: fix handling recovery & reissue in ublk_abort_queue() Commit 8284066946e6 ("ublk: grab request reference when the request is. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: ata: pata_pxa: Fix potential NULL pointer dereference in pxa_ata_probe() devm_ioremap() returns NULL on error. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
In the Linux kernel, the following vulnerability has been resolved: net: libwx: handle page_pool_dev_alloc_pages error page_pool_dev_alloc_pages could return NULL. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: move the limit validation It is not sufficient to directly validate the limit on the data that the user passes. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
In the Linux kernel, the following vulnerability has been resolved: iommu/mediatek: Fix NULL pointer deference in mtk_iommu_device_group Currently, mtk_iommu calls during probe iommu_device_register. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: soc: samsung: exynos-chipid: Add NULL pointer check in exynos_chipid_probe() soc_dev_attr->revision could be NULL, thus, a pointer. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: i3c: Add NULL pointer check in i3c_master_queue_ibi() The I3C master driver may receive an IBI from a target device that has not. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: mfd: ene-kb3930: Fix a potential NULL pointer dereference The off_gpios could be NULL. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix NULL pointer in can_accept_new_subflow When testing valkey benchmark tool with MPTCP, the kernel panics in. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: net: Fix null-ptr-deref by sock_lock_init_class_and_name() and rmmod. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
The Projectopia - WordPress Project Management plugin for WordPress is vulnerable to unauthorized modification of data that can lead to a denial of service due to a missing capability check on the. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. This Missing Authorization vulnerability could allow attackers to access resources or perform actions without proper authorization checks.
The Page View Count plugin for WordPress is vulnerable to unauthorized modification of data that can lead to a denial of service due to a missing capability check on the yellow_message_dontshow(). Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, low attack complexity. This Missing Authorization vulnerability could allow attackers to access resources or perform actions without proper authorization checks.
Volcano is a Kubernetes-native batch scheduling system. Rated high severity (CVSS 8.2), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
A vulnerability in the web application of ctrlX OS allows a remote authenticated (low-privileged) attacker to induce a Denial-of-Service (DoS) condition on the device via multiple crafted HTTP. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
A flaw was found in the mod_auth_openidc module for Apache httpd. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
When DNSdist is configured to provide DoH via the nghttp2 provider, an attacker can cause a denial of service by crafting a DoH exchange that triggers an illegal memory access (double-free) and crash. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A Regular Expression Denial of Service (ReDoS) vulnerability was identified in the huggingface/transformers library, specifically in the file `tokenization_gpt_neox_japanese.py` of the. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
A null pointer dereference was addressed with improved input validation. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The issue was addressed with improved checks. Rated medium severity (CVSS 6.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
A null pointer dereference was addressed with improved input validation. Rated medium severity (CVSS 5.7), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Improper Input Validation vulnerability in Apache Tomcat. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 20.3%.
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Rated medium severity (CVSS 6.0), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.
The multiScan and picoScan are vulnerable to a denial-of-service (DoS) attack. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A vulnerability was found in RefindPlusRepo RefindPlus 0.14.2.AB. Rated medium severity (CVSS 6.8), this vulnerability is low attack complexity. No vendor patch available.
A vulnerability was found in RefindPlusRepo RefindPlus 0.14.2.AB and classified as problematic. Rated medium severity (CVSS 6.8), this vulnerability is low attack complexity. No vendor patch available.
A vulnerability has been found in scipopt scip up to 9.2.1 and classified as problematic. Rated medium severity (CVSS 4.8), this vulnerability is low attack complexity. No vendor patch available.
A vulnerability was found in Apereo CAS 5.2.6. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability was found in Apereo CAS 5.2.6. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
quickjs-ng through 0.9.0 has a missing length check in JS_ReadString for a string, leading to a heap-based buffer overflow. Rated medium severity (CVSS 5.6), this vulnerability is no authentication required. Public exploit code available.
There is a code-related vulnerability in the GoldenDB database product. Rated high severity (CVSS 7.7), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability was found in GL.iNet GL-A1300 Slate Plus, GL-AR300M16 Shadow, GL-AR300M Shadow, GL-AR750 Creta, GL-AR750S-EXT Slate, GL-AX1800 Flint, GL-AXT1800 Slate AX, GL-B1300 Convexa-B, GL-B3000. Rated medium severity (CVSS 6.9), this vulnerability is low attack complexity. No vendor patch available.
Andamiro Pump It Up 20th Anniversary (aka Double X or XX/2019) 1.00.0-2.08.3 allows a physically proximate attacker to cause a denial of service (application crash) via certain deselect actions. Rated low severity (CVSS 2.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Improper Validation of Specified Quantity in Input vulnerability in Mitsubishi Electric Corporation CC-Link IE TSN Remote I/O module, CC-Link IE TSN Analog-Digital Converter module, CC-Link IE TSN. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
tRPC allows users to build & consume fully typesafe APIs without schemas or code generation. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Denial of service due to allocation of resources without limits. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
An issue has been discovered affecting service availability via issue preview in GitLab CE/EE affecting all versions from 16.7 before 17.9.7, 17.10 before 17.10.5, and 17.11 before 17.11.1. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to properly validate the props used by the RetrospectivePost custom post type in the Playbooks plugin, which allows an. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to validate the uniqueness and quantity of task actions within the UpdateRunTaskActions GraphQL operation, which allows. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
In xfig diagramming tool, a segmentation fault while running fig2dev allows an attacker to availability via local input manipulation via read_arcobject function. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
A flaw was found in fig2dev. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
A Null Pointer Dereference vulnerability in the SonicOS SSLVPN Virtual office interface allows a remote, unauthenticated attacker to crash the firewall, potentially leading to a Denial-of-Service. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
In netstat in BusyBox through 1.37.0, local users can launch of network application with an argv[0] containing an ANSI terminal escape sequence, leading to a denial of service (terminal locked up). Rated low severity (CVSS 2.5), this vulnerability is no authentication required. No vendor patch available.
Redis is an open source, in-memory database that persists on disk. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A malicious third party could invoke a persistent denial of service vulnerability in FireEye EDR agent by sending a specially-crafted tamper protection event to the HX service to trigger an. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A vulnerability in the kernel of the Cray Operating System (COS) could allow an attacker to perform a local Denial of Service (DoS) attack. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
NVIDIA NvContainer service for Windows contains a vulnerability in its usage of OpenSSL, where an attacker could exploit a hard-coded constant issue by copying a malicious DLL in a hard-coded path. Rated low severity (CVSS 2.5), this vulnerability is no authentication required. No vendor patch available.
CUBA Platform is a high level framework for enterprise applications development. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Jmix is a set of libraries and tools to speed up Spring Boot data-centric application development. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. This Allocation of Resources Without Limits vulnerability could allow attackers to exhaust system resources through uncontrolled allocation.
An issue in UPF in Open5GS UPF versions up to v2.7.2 results an assertion failure vulnerability in PFCP session parameter validation. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
In Rollback Rx Professional 12.8.0.0, the driver file shieldm.sys allows local users to cause a denial of service because of a null pointer dereference from IOCtl 0x96202000. Rated high severity (CVSS 7.0), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.
NEXTU FLETA AX1500 WIFI6 Router v1.0.3 was discovered to contain a stack overflow via the url parameter at /boafrm/formFilter. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Improper Input Validation vulnerability in Apache Kvrocks. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
When reading binary Ion data through Amazon.IonDotnet using the RawBinaryReader class, Amazon.IonDotnet does not check the number of bytes read from the underlying stream while deserializing the. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An improper authorization vulnerability in Dremio Software allows authenticated users to delete arbitrary files that the system has access to, including system files and files stored in remote. Rated high severity (CVSS 8.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
An issue was discovered in GoBGP before 3.35.0. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable, no authentication required.
libheif before 1.19.6 has a NULL pointer dereference in ImageItem_Grid::get_decoder in image-items/grid.cc because a grid image can reference a nonexistent image item. Rated low severity (CVSS 2.9), this vulnerability is no authentication required. Public exploit code available.
libheif before 1.19.6 has a NULL pointer dereference in ImageItem_iden in image-items/iden.cc. Rated low severity (CVSS 2.9), this vulnerability is no authentication required.
cJSON 1.7.15 might allow a denial of service via a crafted JSON document such as {"a": true, "b": [ null,9999999999999999999999999999999999999999999999912345678901234567]}. Rated low severity (CVSS 2.9), this vulnerability is no authentication required. Public exploit code available and no vendor patch available.
The WP-Syntax WordPress plugin through 1.2 does not properly handle input, allowing an attacker to create a post containing a large number of tags, thereby exploiting a catastrophic backtracking. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue in redoxOS relibc before commit 98aa4ea5 allows a local attacker to cause a denial of service via the setsockopt function. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.
NamelessMC is a free, easy to use & powerful website software for Minecraft servers. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
NamelessMC is a free, easy to use & powerful website software for Minecraft servers. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
In the Linux kernel, the following vulnerability has been resolved: HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition In the ssi_protocol_probe(). Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
A buffer overflow vulnerability in Astrolog v7.70 allows attackers to execute arbitrary code or cause a Denial of Service (DoS) via an overly long environment variable passed to FileOpen function. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
In the Linux kernel, the following vulnerability has been resolved: x86/mce: use is_copy_from_user() to determine copy-from-user context Patch series "mm/hwpoison: Fix regressions in memory failure. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This Memory Leak vulnerability could allow attackers to exhaust available memory leading to denial of service.
In the Linux kernel, the following vulnerability has been resolved: staging: gpib: Fix cb7210 pcmcia Oops The pcmcia_driver struct was still only using the old .name initialization in the drv field. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: clk: samsung: Fix UBSAN panic in samsung_clk_init() With UBSAN_ARRAY_BOUNDS=y, I'm hitting the below panic due to dereferencing. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
In the Linux kernel, the following vulnerability has been resolved: net_sched: skbprio: Remove overly strict queue assertions In the current implementation, skbprio enqueue/dequeue contains an. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr The function mtk_dp_wait_hpd_asserted() may be called before the. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: remoteproc: core: Clear table_sz when rproc_shutdown There is case as below could trigger kernel dump: Use U-Boot to start remote. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: x86/resctrl: Fix allocation of cleanest CLOSID on platforms with no monitors Commit 6eac36bb9eb0 ("x86/resctrl: Allocate the. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
In the Linux kernel, the following vulnerability has been resolved: sfc: fix NULL dereferences in ef100_process_design_param() Since cited commit, ef100_probe_main() and hence also. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
DragonflyDB Dragonfly through 1.28.2 (fixed in 1.29.0) allows authenticated users to cause a denial of service (daemon crash) via a Lua library command that references a large negative integer. Rated low severity (CVSS 3.3), this vulnerability is low attack complexity. Public exploit code available.
DragonflyDB Dragonfly before 1.27.0 allows authenticated users to cause a denial of service (daemon crash) via a crafted Redis command. Rated low severity (CVSS 3.3), this vulnerability is low attack complexity. Public exploit code available.
Use-after-free memory corruption in the Linux kernel's PEAK USB CAN bus driver (peak_usb) exposes systems with PEAK System USB adapters to kernel memory corruption when processing incoming CAN frames from an adjacent network. The flaw stems from incorrect operation ordering: peak_usb_netif_rx_ni(skb) transfers skb ownership to the network stack before the driver finishes accessing the can_frame alias cf, which points into the now-freed skb memory. No public exploit has been identified and EPSS is extremely low (0.07%, 21st percentile), but multiple vendor patch trains from Red Hat and SUSE confirm the issue reached production systems and warranted backported fixes.
In the Linux kernel, the following vulnerability has been resolved: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.
Use-after-free memory corruption in the Linux kernel CAN subsystem's `can_restart()` function allows an attacker with adjacent CAN bus access to trigger kernel memory corruption via a post-free dereference of socket buffer memory. Affected are Linux kernel versions across multiple stable branches through 5.11-rc4, confirmed by seven upstream patch commits and three SUSE enterprise security advisories issued in May 2025. No active exploitation has been confirmed - the vulnerability is absent from CISA KEV, EPSS is 0.06% (20th percentile), and no public POC is known - making this primarily a kernel stability risk rather than an active threat.
In the Linux kernel, the following vulnerability has been resolved: can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ context If a driver calls can_get_echo_skb() during a. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
A vulnerability has been identified in TeleControl Server Basic (All versions < V3.1.2.2). Rated medium severity (CVSS 6.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Access Control Vulnerability in Gerrit chromiumos project configuration in Google ChromeOS 16063.87.0 allows an attacker with a registered Gerrit account to inject malicious code into ChromeOS. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
SoftEtherVPN is a an open-source cross-platform multi-protocol VPN Program. Rated low severity (CVSS 3.1), this vulnerability is remotely exploitable. No vendor patch available.
A vulnerability, which was classified as problematic, was found in PyTorch 2.6.0. Rated medium severity (CVSS 4.8), this vulnerability is low attack complexity. Public exploit code available.