RHSA-2026:35863
Vulnerability from csaf_redhat - Published: 2026-07-06 04:59 - Updated: 2026-10-31 06:21Summary
Red Hat Security Advisory: kernel security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for kernel is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270)
* kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)
* kernel: mptcp: fix slab-use-after-free in __inet_lookup_established (CVE-2026-31669)
* kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing (CVE-2026-43279)
* kernel: tcp: fix potential race in tcp_v6_syn_recv_sock() (CVE-2026-43198)
* kernel: dlm: validate length in dlm_search_rsb_tree (CVE-2026-43125)
* kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329)
* kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop (CVE-2026-46090)
* kernel: RDMA/rxe: Fix double free in rxe_srq_from_init (CVE-2026-45852)
* kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() (CVE-2026-46181)
Bug Fix(es) and Enhancement(s):
* NVMe-FC: Panic during NVMe Controller Reset tests (JIRA:RHEL-178449)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the traffic control `act_ct` path when it is incorrectly configured with non-ingress egress qdiscs (queueing disciplines). This can allow a local user with specific privileges to trigger a kernel crash, leading to a denial of service. In some cases, this vulnerability may also be exploited for privilege escalation.
7.0 (High)
Affected products
Fixed
72 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-debuginfo-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.150.1.el8_8.src | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-abi-stablelists-0:4.18.0-477.150.1.el8_8.noarch | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-core-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-core-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-core-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-core-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-debuginfo-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-devel-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-devel-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-extra-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-extra-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-common-ppc64le-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-common-x86_64-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-devel-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-devel-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-doc-0:4.18.0-477.150.1.el8_8.noarch | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-extra-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-extra-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-debuginfo-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-libs-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-libs-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-debuginfo-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-debuginfo-0:4.18.0-477.150.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:bpftool-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:bpftool-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-0:4.18.0-477.150.1.el8_8.src | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-abi-stablelists-0:4.18.0-477.150.1.el8_8.noarch | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-core-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-core-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-devel-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-modules-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-modules-extra-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debuginfo-common-x86_64-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-devel-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-doc-0:4.18.0-477.150.1.el8_8.noarch | — |
Vendor Fix
fix
|
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-modules-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-modules-extra-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-libs-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:perf-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:perf-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:python3-perf-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:python3-perf-debuginfo-0:4.18.0-477.150.1.el8_8.x86_64 | — |
Vendor Fix
fix
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Threats
Impact
Moderate
A flaw was found in the Linux kernel's netfilter subsystem, specifically within the `nf_conntrack_h323` module. This vulnerability occurs in the `DecodeQ931()` function when processing a zero-length value from a packet. An integer underflow during a length calculation results in a large, incorrect value being passed to a subsequent function, leading to an out-of-bounds read. This could allow an attacker to cause a denial of service or potentially disclose sensitive information.
7.1 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2026-23270
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Multipath TCP (MPTCP) implementation. Due to incorrect memory allocation for IPv6 subflow child sockets, a use-after-free vulnerability exists. A remote attacker could exploit this by triggering concurrent lookups in the kernel's hash table, potentially leading to a denial of service or arbitrary code execution.
7.5 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2026-23270
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Distributed Lock Manager (dlm) module. An attacker could send specially crafted network messages with an oversized length parameter to the dlm_dump_rsb_name() function. This lack of validation can lead to an out-of-bounds write in the dlm_search_rsb_tree() function, potentially causing a buffer overflow. This vulnerability could allow for denial of service or, in some cases, arbitrary code execution.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2026-23270
Threats
Impact
Important
A flaw was found in the Linux kernel. A race condition exists in the TCP (Transmission Control Protocol) IPv6 (Internet Protocol version 6) socket handling, specifically within the tcp_v6_syn_recv_sock() function. This occurs because a child socket becomes visible in the TCP hash table before its IPv6-specific information is fully initialized. A remote attacker could potentially exploit this timing window, leading to an unstable system state or unexpected behavior, which may result in a denial of service (DoS).
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2026-23270
Threats
Impact
Important
A flaw was found in the Linux kernel's ALSA (Advanced Linux Sound Architecture) USB audio subsystem. An inconsistency in how USB audio playback and capture streams are handled can lead to an out-of-bounds write to a memory buffer. This can result in a system crash, causing a denial of service for a local user.
5.8 (Medium)
Affected products
Fixed
72 products, the same list as for
CVE-2026-23270
Threats
Impact
Moderate
A flaw was found in the Netfilter flowtable component of the Linux kernel. This vulnerability occurs because the system does not strictly check the maximum number of hardware offload actions for IPv6, allowing it to process more actions than supported. This could potentially lead to system instability or a denial of service (DoS) condition, where the affected system becomes unresponsive.
7.8 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2026-23270
Threats
Impact
Important
A flaw was found in the Linux kernel's Remote Direct Memory Access (RDMA) subsystem, specifically within the `rxe` driver. An error in the `rxe_srq_from_init` function's memory management can lead to a double free vulnerability. This occurs when an attempt to copy data to user space fails, causing the same memory region to be freed twice. A local attacker could potentially exploit this flaw to cause a denial of service (DoS) by crashing the system.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2026-23270
Threats
Impact
Moderate
A flaw was found in the Linux kernel's ALSA (Advanced Linux Sound Architecture) aloop driver. This Use-After-Free (UAF) vulnerability occurs when loopback_check_format() stops the capture side during a format change, while a concurrent close operation detaches or frees the runtime. An attacker could potentially exploit this to cause a system crash or achieve arbitrary code execution.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2026-23270
Threats
Impact
Moderate
A flaw was found in the Linux kernel's RDMA/mlx4 component. This vulnerability arises from the incorrect use of Read-Copy Update (RCU) in the `mlx4_srq_event()` function. An attacker could potentially trigger an event before the `srq` object is fully initialized, leading to a system crash. This could result in a Denial of Service (DoS) for the affected system.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2026-23270
Threats
Impact
Important
References
64 references
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"text": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation (CVE-2026-23270)\n\n* kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)\n\n* kernel: mptcp: fix slab-use-after-free in __inet_lookup_established (CVE-2026-31669)\n\n* kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing (CVE-2026-43279)\n\n* kernel: tcp: fix potential race in tcp_v6_syn_recv_sock() (CVE-2026-43198)\n\n* kernel: dlm: validate length in dlm_search_rsb_tree (CVE-2026-43125)\n\n* kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329)\n\n* kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop (CVE-2026-46090)\n\n* kernel: RDMA/rxe: Fix double free in rxe_srq_from_init (CVE-2026-45852)\n\n* kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() (CVE-2026-46181)\n\nBug Fix(es) and Enhancement(s):\n\n* NVMe-FC: Panic during NVMe Controller Reset tests (JIRA:RHEL-178449)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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{
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"cwe": {
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"name": "Use After Free"
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"text": "2448745"
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{
"category": "description",
"text": "A flaw was found in the Linux kernel. A use-after-free vulnerability exists in the traffic control `act_ct` path when it is incorrectly configured with non-ingress egress qdiscs (queueing disciplines). This can allow a local user with specific privileges to trigger a kernel crash, leading to a denial of service. In some cases, this vulnerability may also be exploited for privilege escalation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A use after free risk exists in the traffic control act_ct path when it is attached to non ingress egress qdiscs. In this configuration classify can return TC_ACT_CONSUMED while the skb is still held by the defragmentation engine. That can result in the skb being consumed and later accessed again by defragmentation which may lead to a kernel crash. Impact is denial of service in the common case, but keeping in mind that a kernel UAF could be exploitable for privilege escalation in some cases. The bug could happen only if some specific configuration being used (when tc/action being used and if the act_ct linked to incorrect qdisc/block), and in some cases regular user (if with some privileges) can make such configuration.\nThe bug is not triggerable until some specific configuration being used, so considered with limited impact level.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23270"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026031847-CVE-2026-23270-cb9a@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026031847-CVE-2026-23270-cb9a@gregkh/T"
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{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service or privilege escalation"
},
{
"cve": "CVE-2026-23455",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2026-04-03T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2454810"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s netfilter subsystem, specifically within the `nf_conntrack_h323` module. This vulnerability occurs in the `DecodeQ931()` function when processing a zero-length value from a packet. An integer underflow during a length calculation results in a large, incorrect value being passed to a subsequent function, leading to an out-of-bounds read. This could allow an attacker to cause a denial of service or potentially disclose sensitive information.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as Moderate because the `nf_conntrack_h323` module is not loaded by default and automatic helper assignment is disabled in standard Red Hat Enterprise Linux environments. A system is only exposed if administrators have explicitly enabled H.323 connection tracking to inspect or route VoIP traffic. Under these non-default conditions, processing a malformed packet can trigger an out-of-bounds read that may result in a kernel crash or restricted memory disclosure.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-23455"
},
{
"category": "external",
"summary": "RHBZ#2454810",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454810"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-23455",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23455"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-23455",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23455"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026040317-CVE-2026-23455-f045@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026040317-CVE-2026-23455-f045@gregkh/T"
}
],
"release_date": "2026-04-03T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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{
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"baseScore": 7.1,
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"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()"
},
{
"cve": "CVE-2026-31669",
"cwe": {
"id": "CWE-763",
"name": "Release of Invalid Pointer or Reference"
},
"discovery_date": "2026-04-24T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2461503"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Multipath TCP (MPTCP) implementation. Due to incorrect memory allocation for IPv6 subflow child sockets, a use-after-free vulnerability exists. A remote attacker could exploit this by triggering concurrent lookups in the kernel\u0027s hash table, potentially leading to a denial of service or arbitrary code execution.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: mptcp: fix slab-use-after-free in __inet_lookup_established",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A slab use after free can occur in the MPTCP IPv6 subflow path because tcpv6_prot_override may end up with a NULL slab cache pointer and child sockets are then allocated from a non RCU safe kmalloc cache. Lockless ehash lookups rely on SLAB_TYPESAFE_BY_RCU for socket memory stability under rcu_read_lock. When the affected sockets are freed without SOCK_RCU_FREE the memory can be reused immediately and a concurrent __inet_lookup_established lookup can access freed memory. This is at least a denial of service via kernel crash and it is a memory corruption class issue that may allow confidentiality or integrity impact in a worst case scenario. The issue can be network reachable via MPTCP over IPv6, but there is no known attack scenario for now. There is no confirmed practical trigger scenario under default configurations. It appears to require specific non-default preconditions (MPTCP/IPv6 runtime conditions and vulnerable child socket creation paths) that are not known to be reachable by default, so this is the reason to keep this one \"Moderate\" impact level.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-31669"
},
{
"category": "external",
"summary": "RHBZ#2461503",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461503"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-31669",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31669"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-31669",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31669"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026042406-CVE-2026-31669-0e0d@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026042406-CVE-2026-31669-0e0d@gregkh/T"
}
],
"release_date": "2026-04-24T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:35863"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: mptcp: fix slab-use-after-free in __inet_lookup_established"
},
{
"cve": "CVE-2026-43125",
"cwe": {
"id": "CWE-130",
"name": "Improper Handling of Length Parameter Inconsistency"
},
"discovery_date": "2026-05-06T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2467234"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Distributed Lock Manager (dlm) module. An attacker could send specially crafted network messages with an oversized length parameter to the dlm_dump_rsb_name() function. This lack of validation can lead to an out-of-bounds write in the dlm_search_rsb_tree() function, potentially causing a buffer overflow. This vulnerability could allow for denial of service or, in some cases, arbitrary code execution.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: dlm: validate length in dlm_search_rsb_tree",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat has classified this vulnerability as having Important impact because an out-of-bounds write in kernel memory can lead to system crashes or potential execution of arbitrary code with kernel privileges. In standard deployments, the Distributed Lock Manager module is not loaded by default and is only exposed when clustering or shared-disk storage services such as GFS2 are active. Consequently, systems operating outside of high-availability cluster configurations do not expose the affected interface.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-43125"
},
{
"category": "external",
"summary": "RHBZ#2467234",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467234"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-43125",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-43125"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43125",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43125"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026050619-CVE-2026-43125-c9f9@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026050619-CVE-2026-43125-c9f9@gregkh/T"
}
],
"release_date": "2026-05-06T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"restart_required": {
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},
"url": "https://access.redhat.com/errata/RHSA-2026:35863"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: dlm: validate length in dlm_search_rsb_tree"
},
{
"cve": "CVE-2026-43198",
"cwe": {
"id": "CWE-821",
"name": "Incorrect Synchronization"
},
"discovery_date": "2026-05-06T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2467228"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel. A race condition exists in the TCP (Transmission Control Protocol) IPv6 (Internet Protocol version 6) socket handling, specifically within the tcp_v6_syn_recv_sock() function. This occurs because a child socket becomes visible in the TCP hash table before its IPv6-specific information is fully initialized. A remote attacker could potentially exploit this timing window, leading to an unstable system state or unexpected behavior, which may result in a denial of service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: tcp: fix potential race in tcp_v6_syn_recv_sock()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as Important severity because winning the timing window during socket setup allows an attacker to corrupt kernel memory or trigger a system crash across multi-core systems, potentially leading to privilege escalation or complete denial of service. Standard Red Hat Enterprise Linux installations enable dual-stack TCP networking by default, exposing system daemons listening on IPv6 addresses to this concurrency flaw during rapid inbound connection handshakes. While triggering the synchronization failure requires precisely timed concurrent operations on newly established sockets, the potential blast radius affects host stability without requiring elevated administrative privileges.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-43198"
},
{
"category": "external",
"summary": "RHBZ#2467228",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467228"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-43198",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-43198"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43198",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43198"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026050645-CVE-2026-43198-0870@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026050645-CVE-2026-43198-0870@gregkh/T"
}
],
"release_date": "2026-05-06T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:35863"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: tcp: fix potential race in tcp_v6_syn_recv_sock()"
},
{
"cve": "CVE-2026-43279",
"cwe": {
"id": "CWE-787",
"name": "Out-of-bounds Write"
},
"discovery_date": "2026-05-06T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2467215"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s ALSA (Advanced Linux Sound Architecture) USB audio subsystem. An inconsistency in how USB audio playback and capture streams are handled can lead to an out-of-bounds write to a memory buffer. This can result in a system crash, causing a denial of service for a local user.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "ALSA USB audio could write past the silent URB transfer buffer when implicit feedback stream sizing was inconsistent, causing a constrained kernel buffer overwrite with likely crash/DoS impact. Exploitation requires a specific USB audio device/configuration.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-43279"
},
{
"category": "external",
"summary": "RHBZ#2467215",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467215"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-43279",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-43279"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43279",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43279"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026050613-CVE-2026-43279-4530@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026050613-CVE-2026-43279-4530@gregkh/T"
}
],
"release_date": "2026-05-06T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:35863"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H",
"version": "3.1"
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"details": "Moderate"
}
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"title": "kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing"
},
{
"cve": "CVE-2026-43329",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-05-08T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2468124"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Netfilter flowtable component of the Linux kernel. This vulnerability occurs because the system does not strictly check the maximum number of hardware offload actions for IPv6, allowing it to process more actions than supported. This could potentially lead to system instability or a denial of service (DoS) condition, where the affected system becomes unresponsive.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: netfilter: flowtable: strictly check for maximum number of actions",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-43329"
},
{
"category": "external",
"summary": "RHBZ#2468124",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468124"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-43329",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-43329"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43329",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43329"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43329.mbox",
"url": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43329.mbox"
}
],
"release_date": "2026-05-08T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:35863"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: netfilter: flowtable: strictly check for maximum number of actions"
},
{
"cve": "CVE-2026-45852",
"cwe": {
"id": "CWE-1341",
"name": "Multiple Releases of Same Resource or Handle"
},
"discovery_date": "2026-05-27T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2482166"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Remote Direct Memory Access (RDMA) subsystem, specifically within the `rxe` driver. An error in the `rxe_srq_from_init` function\u0027s memory management can lead to a double free vulnerability. This occurs when an attempt to copy data to user space fails, causing the same memory region to be freed twice. A local attacker could potentially exploit this flaw to cause a denial of service (DoS) by crashing the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: RDMA/rxe: Fix double free in rxe_srq_from_init",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-45852"
},
{
"category": "external",
"summary": "RHBZ#2482166",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482166"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-45852",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-45852"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-45852",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45852"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026052708-CVE-2026-45852-fcf9@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026052708-CVE-2026-45852-fcf9@gregkh/T"
}
],
"release_date": "2026-05-27T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:35863"
},
{
"category": "workaround",
"details": "To mitigate this vulnerability, prevent the `rdma_rxe` kernel module from loading. Create a file `/etc/modprobe.d/blacklist-rdma_rxe.conf` with `blacklist rdma_rxe`. Regenerate the initramfs using `sudo dracut -f -v` (or `sudo mkinitrd -f -v /boot/initramfs-$(uname -r).img $(uname -r)` for older systems) and reboot. This action may impact functionality dependent on the RDMA/rxe driver.",
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],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: RDMA/rxe: Fix double free in rxe_srq_from_init"
},
{
"cve": "CVE-2026-46090",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2026-05-27T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2481980"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s ALSA (Advanced Linux Sound Architecture) aloop driver. This Use-After-Free (UAF) vulnerability occurs when loopback_check_format() stops the capture side during a format change, while a concurrent close operation detaches or frees the runtime. An attacker could potentially exploit this to cause a system crash or achieve arbitrary code execution.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as Moderate impact because successful exploitation requires local user access and winning a tight race condition during stream teardown, limiting practical reliability. The snd-aloop kernel module is not loaded by default in standard Red Hat Enterprise Linux deployments, requiring deliberate configuration or application demand to be present. In environments where the loopback driver is active, an unprivileged local attacker could trigger a use-after-free condition to cause a denial of service (system crash) or potentially execute arbitrary code.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-46090"
},
{
"category": "external",
"summary": "RHBZ#2481980",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481980"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46090",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46090"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46090",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46090"
},
{
"category": "external",
"summary": "https://kernelcve.org/list/?q=CVE-2026-46090",
"url": "https://kernelcve.org/list/?q=CVE-2026-46090"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026052702-CVE-2026-46090-1211@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026052702-CVE-2026-46090-1211@gregkh/T"
}
],
"release_date": "2026-05-27T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"restart_required": {
"category": "machine"
},
"url": "https://access.redhat.com/errata/RHSA-2026:35863"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop"
},
{
"cve": "CVE-2026-46181",
"cwe": {
"id": "CWE-366",
"name": "Race Condition within a Thread"
},
"discovery_date": "2026-05-28T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2482532"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s RDMA/mlx4 component. This vulnerability arises from the incorrect use of Read-Copy Update (RCU) in the `mlx4_srq_event()` function. An attacker could potentially trigger an event before the `srq` object is fully initialized, leading to a system crash. This could result in a Denial of Service (DoS) for the affected system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-46181"
},
{
"category": "external",
"summary": "RHBZ#2482532",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482532"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46181",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46181"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46181",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46181"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026052829-CVE-2026-46181-ecff@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026052829-CVE-2026-46181-ecff@gregkh/T"
}
],
"release_date": "2026-05-28T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-06T04:59:51+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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},
"url": "https://access.redhat.com/errata/RHSA-2026:35863"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()"
}
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.