RHSA-2025:19469MediumCVSS 7.3

Red Hat Security Advisory: kernel security update

Published
November 3, 2025
Last Modified
July 30, 2026

🔗 CVE IDs covered (2)

CVE-2025-39702 →CVE-2025-39881 →

📋 Description

CVE-2025-39702 — kernel: ipv6: sr: Fix MAC comparison to be constant-time CVE-2025-39881 — kernel: kernfs: Fix UAF in polling when open file is released

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream (v. 10)
  • Red Hat Enterprise Linux BaseOS (v. 10)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • Red Hat Enterprise Linux Real Time (v. 10)
  • Red Hat Enterprise Linux Real Time for NFV (v. 10)
  • kernel-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-55.42.1.el10_0.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-55.42.1.el10_0.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-55.42.1.el10_0.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-55.42.1.el10_0.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-core-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-core-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 10)
  • kernel-64k-debug-devel-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-devel-matched-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-modules-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-modules-core-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-modules-extra-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 10)
  • kernel-64k-devel-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-devel-matched-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-modules-0:6.12.0-55.42.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • +170 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

🔗 References (5)