RHSA-2026:19521
Vulnerability from csaf_redhat - Published: 2026-05-20 04:10 - Updated: 2026-09-01 12:02Summary
Red Hat Security Advisory: kernel security 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: RDMA/rxe use-after-free vulnerability leading to potential arbitrary code execution (CVE-2025-38024)
* kernel: ALSA: aloop: Fix racy access at PCM trigger (CVE-2026-23191)
* kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)
* kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling (CVE-2026-23401)
* kernel: Linux kernel: Use-after-free in bonding driver leads to denial of service (CVE-2026-31419)
* kernel: can: raw: fix ro->uniq use-after-free in raw_rcv() (CVE-2026-31532)
* kernel: "Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel (CVE-2026-46300)
* kernel: Read root-owned files as an unprivileged user (CVE-2026-46333)
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's Remote Direct Memory Access (RDMA) subsystem, specifically within the `rxe` component. This use-after-free vulnerability occurs in the `rxe_create_cq` function. When the `rxe_cq_from_init` function fails, the subsequent call to `rxe_cleanup` attempts to free memory resources that have already been released, leading to memory corruption. A local attacker with high privileges could exploit this flaw to cause a denial of service or potentially achieve arbitrary code execution.
7.3 (High)
Affected products
Fixed
72 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-debuginfo-0:4.18.0-477.143.1.el8_8.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:bpftool-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.143.1.el8_8.src | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-abi-stablelists-0:4.18.0-477.143.1.el8_8.noarch | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-core-0:4.18.0-477.143.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-core-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-core-0:4.18.0-477.143.1.el8_8.ppc64le | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-core-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-debuginfo-0:4.18.0-477.143.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-devel-0:4.18.0-477.143.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-devel-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-extra-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debug-modules-extra-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-common-ppc64le-0:4.18.0-477.143.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-debuginfo-common-x86_64-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-devel-0:4.18.0-477.143.1.el8_8.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-devel-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-doc-0:4.18.0-477.143.1.el8_8.noarch | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-extra-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-modules-extra-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-debuginfo-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-libs-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:kernel-tools-libs-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-debuginfo-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:perf-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-debuginfo-0:4.18.0-477.143.1.el8_8.ppc64le | — |
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| Unresolved product id: BaseOS-8.8.0.Z.E4S:python3-perf-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:bpftool-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:bpftool-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-0:4.18.0-477.143.1.el8_8.src | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-abi-stablelists-0:4.18.0-477.143.1.el8_8.noarch | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-core-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-core-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-devel-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-modules-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debug-modules-extra-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-debuginfo-common-x86_64-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-devel-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-doc-0:4.18.0-477.143.1.el8_8.noarch | — |
Vendor Fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-modules-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-modules-extra-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:kernel-tools-libs-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:perf-0:4.18.0-477.143.1.el8_8.x86_64 | — |
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fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:perf-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
Workaround
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:python3-perf-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
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| Unresolved product id: BaseOS-8.8.0.Z.TUS:python3-perf-debuginfo-0:4.18.0-477.143.1.el8_8.x86_64 | — |
Vendor Fix
fix
Workaround
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Threats
Impact
Moderate
In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Fix racy access at PCM trigger The PCM trigger callback of aloop driver tries to check the PCM state and stop the stream of the tied substream in the corresponding cable. Since both check and stop operations are performed outside the cable lock, this may result in UAF when a program attempts to trigger frequently while opening/closing the tied stream, as spotted by fuzzers. For addressing the UAF, this patch changes two things: - It covers the most of code in loopback_check_format() with cable->lock spinlock, and add the proper NULL checks. This avoids already some racy accesses. - In addition, now we try to check the state of the capture PCM stream that may be stopped in this function, which was the major pain point leading to UAF.
7.1 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2025-38024
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Remote Direct Memory Access (RDMA) `umad` (User Mode Access Device) component. A local user can exploit this vulnerability by manipulating input, causing an integer underflow that leads to an out-of-bounds memory write. This memory corruption can result in a denial of service (DoS) by crashing the system, and may also lead to limited information disclosure or data integrity issues.
7.3 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2025-38024
Threats
Impact
Moderate
A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) component. A local attacker with privileges on the host system could exploit a vulnerability in how KVM handles shadow page table entries (SPTEs) during memory-mapped I/O (MMIO) operations. By manipulating guest page table entries (gPTEs) from host userspace, an attacker could cause KVM to install an MMIO SPTE without properly removing an existing shadow-present SPTE. This improper handling could lead to a kernel warning, resulting in a denial of service or potentially allowing for privilege escalation or information disclosure.
8.1 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2025-38024
Threats
Impact
Important
A flaw was found in the Linux kernel's bonding driver. A local attacker with low privileges could exploit a use-after-free vulnerability in the `bond_xmit_broadcast()` function. This occurs due to a race condition during concurrent slave enslave/release operations, which can lead to the original socket buffer (skb) being double-freed. Successful exploitation of this flaw can result in a system crash, leading to a denial of service.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2025-38024
Threats
Impact
Important
A flaw was found in the Linux kernel's Controller Area Network (CAN) raw socket implementation. A use-after-free vulnerability can occur due to a timing window during the unregistration of CAN receive filters, allowing a freed memory region to be accessed. This could lead to system instability or a denial of service (DoS).
7.1 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2025-38024
Threats
Impact
Moderate
A flaw was found in the Linux kernel's networking (skbuff) component. When skb_try_coalesce() attaches paged fragments, it can lose the SKBFL_SHARED_FRAG marker. This can lead to the Encapsulating Security Payload (ESP) input decrypting data in place over page-cache backed fragments, potentially resulting in data corruption.
7.0 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2025-38024
Threats
Impact
Important
A flaw was found in the Linux kernel's XFRM ESP-in-TCP subsystem. Unsafe in-place cryptographic processing allows a low-privileged local attacker to write arbitrary bytes into the page cache of read-only files, including sensitive system files. An attacker can exploit this to overwrite privileged binaries and gain root privileges.
7.8 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2025-38024
Threats
Impact
Important
A vulnerability was found in the Linux kernel that allows an unprivileged local user to read sensitive files normally restricted to the root user. The flaw occurs during process exit, where a brief window allows an attacker to intercept file access from a privileged process before it fully terminates. Successful exploitation may lead to the disclosure of sensitive data such as SSH host private keys or /etc/shadow contents.
7.8 (High)
Affected products
Fixed
72 products, the same list as for
CVE-2025-38024
Threats
Impact
Important
References
58 references
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"text": "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.\n\nRed 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.",
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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: RDMA/rxe use-after-free vulnerability leading to potential arbitrary code execution (CVE-2025-38024)\n\n* kernel: ALSA: aloop: Fix racy access at PCM trigger (CVE-2026-23191)\n\n* kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)\n\n* kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling (CVE-2026-23401)\n\n* kernel: Linux kernel: Use-after-free in bonding driver leads to denial of service (CVE-2026-31419)\n\n* kernel: can: raw: fix ro-\u003euniq use-after-free in raw_rcv() (CVE-2026-31532)\n\n* kernel: \"Fragnesia\" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel (CVE-2026-46300)\n\n* kernel: Read root-owned files as an unprivileged user (CVE-2026-46333)\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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{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Remote Direct Memory Access (RDMA) subsystem, specifically within the `rxe` component. This use-after-free vulnerability occurs in the `rxe_create_cq` function. When the `rxe_cq_from_init` function fails, the subsequent call to `rxe_cleanup` attempts to free memory resources that have already been released, leading to memory corruption. A local attacker with high privileges could exploit this flaw to cause a denial of service or potentially achieve arbitrary code execution.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: Linux kernel: RDMA/rxe use-after-free vulnerability leading to potential arbitrary code execution",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Moderate: A use-after-free leading to a kernel information leak issue was seen in the Linux kernel\u0027s RDMA `rxe` component, which allows a local attacker with special group privilege to cause a denial of service. This flaw affects Red Hat Enterprise Linux 7, 8, and 9.",
"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": "vendor_fix",
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"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-2026:19521"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent the `rxe` kernel module from loading. This can be achieved by creating a blacklist rule.\n\n1. Create a file `/etc/modprobe.d/blacklist-rxe.conf` with the following content:\n```\nblacklist rxe\ninstall rxe /bin/true\n```\n2. Rebuild the initial ramdisk:\n```bash\ndracut -f -v\n```\n3. Reboot the system for the changes to take effect.\n\nWarning: Blacklisting the `rxe` module may impact functionality that relies on Soft RoCE.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
"version": "3.1"
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: Linux kernel: RDMA/rxe use-after-free vulnerability leading to potential arbitrary code execution"
},
{
"cve": "CVE-2026-23191",
"cwe": {
"id": "CWE-367",
"name": "Time-of-check Time-of-use (TOCTOU) Race Condition"
},
"discovery_date": "2026-02-14T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2439947"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: aloop: Fix racy access at PCM trigger\n\nThe PCM trigger callback of aloop driver tries to check the PCM state\nand stop the stream of the tied substream in the corresponding cable.\nSince both check and stop operations are performed outside the cable\nlock, this may result in UAF when a program attempts to trigger\nfrequently while opening/closing the tied stream, as spotted by\nfuzzers.\n\nFor addressing the UAF, this patch changes two things:\n- It covers the most of code in loopback_check_format() with\n cable-\u003elock spinlock, and add the proper NULL checks. This avoids\n already some racy accesses.\n- In addition, now we try to check the state of the capture PCM stream\n that may be stopped in this function, which was the major pain point\n leading to UAF.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ALSA: aloop: Fix racy access at PCM trigger",
"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-2026-23191"
},
{
"category": "external",
"summary": "RHBZ#2439947",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2439947"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-23191",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23191"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-23191",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23191"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026021433-CVE-2026-23191-f990@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026021433-CVE-2026-23191-f990@gregkh/T"
}
],
"release_date": "2026-02-14T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-20T04:10:38+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-2026:19521"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: ALSA: aloop: Fix racy access at PCM trigger"
},
{
"cve": "CVE-2026-23243",
"cwe": {
"id": "CWE-131",
"name": "Incorrect Calculation of Buffer Size"
},
"discovery_date": "2026-03-18T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2448594"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Remote Direct Memory Access (RDMA) `umad` (User Mode Access Device) component. A local user can exploit this vulnerability by manipulating input, causing an integer underflow that leads to an out-of-bounds memory write. This memory corruption can result in a denial of service (DoS) by crashing the system, and may also lead to limited information disclosure or data integrity issues.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: Linux kernel: Denial of service and memory corruption in RDMA umad",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This bug is a kernel out-of-bounds write in the RDMA umad write path caused by a user-controlled length calculation that could underflow and pass an invalid data_len into MAD send buffer creation.\nA local user with access to the umad interface can trigger the issue by supplying mismatched MAD and RMPP header sizes, which leads to an out-of-bounds memset in the send MAD allocation path and can corrupt kernel memory.",
"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-2026-23243"
},
{
"category": "external",
"summary": "RHBZ#2448594",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2448594"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-23243",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23243"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-23243",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23243"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026031816-CVE-2026-23243-b88e@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026031816-CVE-2026-23243-b88e@gregkh/T"
}
],
"release_date": "2026-03-18T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-20T04:10:38+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-2026:19521"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent module ib_umad from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.3,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: Linux kernel: Denial of service and memory corruption in RDMA umad"
},
{
"cve": "CVE-2026-23401",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2026-04-01T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2453803"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Kernel-based Virtual Machine (KVM) component. A local attacker with privileges on the host system could exploit a vulnerability in how KVM handles shadow page table entries (SPTEs) during memory-mapped I/O (MMIO) operations. By manipulating guest page table entries (gPTEs) from host userspace, an attacker could cause KVM to install an MMIO SPTE without properly removing an existing shadow-present SPTE. This improper handling could lead to a kernel warning, resulting in a denial of service or potentially allowing for privilege escalation or information disclosure.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important impact vulnerability. A flaw in the KVM\u0027s x86/mmu component in the Linux kernel could allow a privileged guest user to trigger a host denial of service. This issue occurs when host userspace modifies a shadowed gPTE to switch from a memslot to emulated MMIO, leading to a missing SPTE zap. Red Hat Enterprise Linux 8, 9, and 10, and Red Hat In-Vehicle OS are affected. Red Hat Enterprise Linux 6 and 7 are not affected.",
"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-2026-23401"
},
{
"category": "external",
"summary": "RHBZ#2453803",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2453803"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-23401",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23401"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-23401",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23401"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026040108-CVE-2026-23401-956d@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026040108-CVE-2026-23401-956d@gregkh/T"
}
],
"release_date": "2026-04-01T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-20T04:10:38+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-2026:19521"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling"
},
{
"cve": "CVE-2026-31419",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2026-04-13T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2457829"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s bonding driver. A local attacker with low privileges could exploit a use-after-free vulnerability in the `bond_xmit_broadcast()` function. This occurs due to a race condition during concurrent slave enslave/release operations, which can lead to the original socket buffer (skb) being double-freed. Successful exploitation of this flaw can result in a system crash, leading to a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: Linux kernel: Use-after-free in bonding driver leads to denial of service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important impact flaw affecting the Linux kernel\u0027s bonding driver in Red Hat Enterprise Linux 6, 8.8 and later, 9.2 and later, and 10, as well as Red Hat In-Vehicle OS 2.0. A local attacker with low privileges could trigger a use-after-free vulnerability, leading to a system crash and denial of service. Red Hat Enterprise Linux 7, 8.2, 8.4, 8.6, and 9.0 are not affected as the vulnerable code is not present.",
"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-2026-31419"
},
{
"category": "external",
"summary": "RHBZ#2457829",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457829"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-31419",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31419"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-31419",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31419"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026041353-CVE-2026-31419-e176@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026041353-CVE-2026-31419-e176@gregkh/T"
}
],
"release_date": "2026-04-13T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-20T04:10:38+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-2026:19521"
}
],
"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: Linux kernel: Use-after-free in bonding driver leads to denial of service"
},
{
"cve": "CVE-2026-31532",
"cwe": {
"id": "CWE-366",
"name": "Race Condition within a Thread"
},
"discovery_date": "2026-04-23T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2461107"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s Controller Area Network (CAN) raw socket implementation. A use-after-free vulnerability can occur due to a timing window during the unregistration of CAN receive filters, allowing a freed memory region to be accessed. This could lead to system instability or a denial of service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: can: raw: fix ro-\u003euniq use-after-free in raw_rcv()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "A use-after-free flaw in the Linux kernel CAN raw socket implementation can occur when raw_release() frees the per-CPU ro-\u003euniq storage before RCU-deferred receive callbacks have fully drained. A local attacker able to create raw CAN sockets and trigger CAN receive activity could race socket teardown with raw_rcv() and cause a kernel crash. The likely impact is denial of service, while privilege escalation would require additional, unproven control over per-CPU memory reuse.\nThe issue appears more consistent with an RCU lifetime/race-condition bug leading primarily to denial of service, as exploitation depends on a narrow teardown race involving a percpu object rather than a generic reclaimable slab object, with no demonstrated privilege-escalation path or obvious controlled overwrite primitive in the relatively niche CAN raw socket subsystem.",
"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-2026-31532"
},
{
"category": "external",
"summary": "RHBZ#2461107",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461107"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-31532",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31532"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-31532",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31532"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2026042349-CVE-2026-31532-a820@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2026042349-CVE-2026-31532-a820@gregkh/T"
}
],
"release_date": "2026-04-23T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-20T04:10:38+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-2026:19521"
},
{
"category": "workaround",
"details": "To mitigate this issue, prevent the `can` kernel module from loading if CAN functionality is not required. This can be achieved by blacklisting the module.\n\nCreate a file named `/etc/modprobe.d/blacklist-can.conf` with the following content:\n```\nblacklist can\ninstall can /bin/true\n```\nAfter creating the file, regenerate the initramfs and reboot the system for the changes to take effect.\n```bash\ndracut -f -v\nreboot\n```\nThis mitigation may impact systems that rely on CAN interfaces for their operation.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
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],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: can: raw: fix ro-\u003euniq use-after-free in raw_rcv()"
},
{
"cve": "CVE-2026-43503",
"cwe": {
"id": "CWE-664",
"name": "Improper Control of a Resource Through its Lifetime"
},
"discovery_date": "2026-05-23T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2480902"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s networking (skbuff) component. When skb_try_coalesce() attaches paged fragments, it can lose the SKBFL_SHARED_FRAG marker. This can lead to the Encapsulating Security Payload (ESP) input decrypting data in place over page-cache backed fragments, potentially resulting in data corruption.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net: skbuff: propagate shared-frag marker through frag-transfer helpers",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Impact is rated as Important because the privileged file-backed cache pages may be modified through a shared-page ownership bypass. Within Red Hat Enterprise Linux and Red Hat OpenShift Container Platform, this vulnerability was fixed at the same time as CVE-2026-46300.",
"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-2026-43503"
},
{
"category": "external",
"summary": "RHBZ#2480902",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480902"
},
{
"category": "external",
"summary": "RHSB-2026-003",
"url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-003"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-43503",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-43503"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43503",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43503"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43503.mbox",
"url": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43503.mbox"
}
],
"release_date": "2026-05-23T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-20T04:10:38+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-2026:19521"
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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": "Important"
}
],
"title": "kernel: net: skbuff: propagate shared-frag marker through frag-transfer helpers"
},
{
"cve": "CVE-2026-46300",
"cwe": {
"id": "CWE-123",
"name": "Write-what-where Condition"
},
"discovery_date": "2026-05-13T13:28:21.270000+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2477015"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s XFRM ESP-in-TCP subsystem. Unsafe in-place cryptographic processing allows a low-privileged local attacker to write arbitrary bytes into the page cache of read-only files, including sensitive system files. An attacker can exploit this to overwrite privileged binaries and gain root privileges.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: \"Fragnesia\" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue is classified as Important, rather than Critical severity, because exploitation requires local access to the system. A low-privileged local attacker can exploit this flaw in the Linux kernel\u0027s XFRM ESP-in-TCP subsystem to gain root privileges by overwriting sensitive system files. Exploitation does not require user interaction, potentially resulting in full compromise of confidentiality, integrity, and availability.",
"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-2026-46300"
},
{
"category": "external",
"summary": "RHBZ#2477015",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477015"
},
{
"category": "external",
"summary": "RHSB-2026-003",
"url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-003"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46300",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46300"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46300",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46300"
}
],
"release_date": "2026-05-13T12:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-20T04:10:38+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-2026:19521"
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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: \"Fragnesia\" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel"
},
{
"cve": "CVE-2026-46333",
"cwe": {
"id": "CWE-269",
"name": "Improper Privilege Management"
},
"discovery_date": "2026-05-15T08:27:21.590000+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2477802"
}
],
"notes": [
{
"category": "description",
"text": "A vulnerability was found in the Linux kernel that allows an unprivileged local user to read sensitive files normally restricted to the root user. The flaw occurs during process exit, where a brief window allows an attacker to intercept file access from a privileged process before it fully terminates. Successful exploitation may lead to the disclosure of sensitive data such as SSH host private keys or /etc/shadow contents.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: Read root-owned files as an unprivileged user",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This is an Important flaw in the Linux kernel that allows a local unprivileged attacker to read root-owned files. The vulnerability arises from a race condition during process termination, enabling a brief window where sensitive data, such as SSH host private keys or /etc/shadow contents, can be disclosed. This could lead to unauthorized access to sensitive information on affected Red Hat Enterprise Linux systems.\n\nIn OpenShift Container Platform 4, this flaw is rated Low. The default `restricted-v2` Security Context Constraint (SCC) sets `allowPrivilegeEscalation: false` on all pods, which causes the kernel to ignore setuid file bits and prevents target binaries from opening privileged files, breaking the exploit chain entirely. Under non-default SCCs such as `anyuid` that permit privilege escalation, the vulnerability is constrained by PID and mount namespace isolation to the container\u0027s own filesystem. An attacker would only be able to access root-owned files already within the container, not host or cross-pod resources. In practice, containers rarely contain sensitive root-owned files that are not already accessible to the pod user through normal means.",
"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-2026-46333"
},
{
"category": "external",
"summary": "RHBZ#2477802",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477802"
},
{
"category": "external",
"summary": "RHSB-2026-004",
"url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-004"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-46333",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-46333"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46333",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46333"
},
{
"category": "external",
"summary": "https://blog.qualys.com/vulnerabilities-threat-research/2026/05/20/cve-2026-46333-local-root-privilege-escalation-and-credential-disclosure-in-the-linux-kernel-ptrace-path",
"url": "https://blog.qualys.com/vulnerabilities-threat-research/2026/05/20/cve-2026-46333-local-root-privilege-escalation-and-credential-disclosure-in-the-linux-kernel-ptrace-path"
},
{
"category": "external",
"summary": "https://github.com/torvalds/linux/commit/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a",
"url": "https://github.com/torvalds/linux/commit/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a"
}
],
"release_date": "2026-05-15T05:55:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-05-20T04:10:38+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-2026:19521"
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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: Read root-owned files as an unprivileged user"
}
]
}
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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.
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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.
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