RHSA-2026:95587HighCVSS 8.8

Red Hat Security Advisory: kpatch-patch-4_18_0-553_109_1, kpatch-patch-4_18_0-553_125_1, kpatch-patch-4_18_0-553_158_1, kpatch-patch-4_18_0-553_72_1, and kpatch-patch-4_18_0-553_85_1 security update

Published
November 5, 2026
Last Modified
November 9, 2026

🔗 CVE IDs covered (3)

CVE-2026-52923 →CVE-2026-74705 →CVE-2026-81000 →

📋 Description

CVE-2026-52923 — kernel: ipc: limit next_id allocation to the valid ID range CVE-2026-74705 — kernel: udp: fix potential use-after-free in tunnel segmentation CVE-2026-81000 — kernel: net: tun: bound receive headroom

🎯 Affected products36

  • Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-0:1-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-0:1-15.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-0:1-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debuginfo-0:1-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debuginfo-0:1-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debugsource-0:1-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debugsource-0:1-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-0:1-12.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-0:1-12.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-0:1-12.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debuginfo-0:1-12.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debuginfo-0:1-12.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debugsource-0:1-12.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debugsource-0:1-12.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-0:1-4.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-0:1-4.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-0:1-4.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-debuginfo-0:1-4.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-debuginfo-0:1-4.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-debugsource-0:1-4.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-debugsource-0:1-4.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-0:1-19.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-0:1-19.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-0:1-19.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debuginfo-0:1-19.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debuginfo-0:1-19.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debugsource-0:1-19.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debugsource-0:1-19.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_85_1-0:1-17.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • +6 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 Workaround: 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. Workaround: See the security bulletin for a detailed mitigation procedure.

🔗 References (6)