Security update for the Linux Kernel (Live Patch 18 for SUSE Linux Enterprise 15 SP7)
Description
This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.66 fixes various security issues: The following security issues were fixed: - CVE-2025-40204,CVE-2026-53224,CVE-2026-53246: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing (bsc#1253437 bsc#1270023 bsc#1270024). - CVE-2026-46242: eventpoll: fix ep_remove struct eventpoll / struct file UAF (bsc#1270300). - CVE-2026-52956: libceph: Fix potential out-of-bounds access in __ceph_x_decrypt() (bsc#1272139). - CVE-2026-64530: net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_hand (bsc#1271867). - CVE-2026-64600: xfs: resample the data fork mapping after cycling ILOCK (RefluXFS) (bsc#1271543).
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers security fixes in Red Hat OpenShift Container Platform 4.21.25, specifically addressing three kernel vulnerabilities: CVE-2026-46242 (eventpoll: use-after-free in ep_remove involving struct eventpoll and struct file), CVE-2026-46316 (KVM arm64 vgic-its: improper translation cache reference handling), and CVE-2026-53359 (KVM x86: shadow paging use-after-free due to unexpected role). These vulnerabilities could lead to high impact on confidentiality, integrity, and availability as indicated by the CVSS vector for CVE-2026-46242. The advisory recommends upgrading to the fixed container images and packages available through the appropriate release channels.
Potential Impact
The vulnerabilities fixed in this update have a high security impact, potentially allowing local attackers with limited privileges to cause use-after-free conditions in kernel components, which can lead to system crashes or escalation of privileges affecting confidentiality, integrity, and availability. The CVSS vector for CVE-2026-46242 indicates local attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available in Red Hat OpenShift Container Platform 4.21.25. Users should upgrade to this version using the OpenShift CLI (oc) or web console as soon as the updated packages and container images are available in their release channel. Detailed upgrade instructions are provided by Red Hat at https://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html-single/updating_clusters/index#updating-cluster-cli. No additional mitigation is indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-46242
- Cve Count
- 1
- Cvss Version
- 3.1
Threat ID: 6a1ca158e29bf47b505e1f5f
Added to database: 05/31/2026, 21:00:08 UTC
Last enriched: 07/30/2026, 14:47:00 UTC
Last updated: 10/20/2026, 06:48:16 UTC
Views: 266
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