RHSA-2024:0876HighCVSS 7.8

Red Hat Security Advisory: kpatch-patch security update

Published
February 20, 2024
Last Modified
August 6, 2026

🔗 CVE IDs covered (4)

CVE-2023-4623 →CVE-2023-4921 →CVE-2023-45871 →CVE-2024-0646 →

📋 Description

CVE-2023-4623 — kernel: net/sched: sch_hfsc UAF CVE-2023-4921 — kernel: use-after-free in sch_qfq network scheduler CVE-2023-45871 — kernel: IGB driver inadequate buffer size for frames larger than MTU CVE-2024-0646 — kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as destination

🎯 Affected products22

  • Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_11_1-0:1-1.el8_9.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_11_1-0:1-1.el8_9.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_11_1-0:1-1.el8_9.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_11_1-debuginfo-0:1-1.el8_9.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_11_1-debuginfo-0:1-1.el8_9.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_11_1-debugsource-0:1-1.el8_9.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_11_1-debugsource-0:1-1.el8_9.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_5_1-0:1-3.el8_9.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_5_1-0:1-3.el8_9.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_5_1-0:1-3.el8_9.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_5_1-debuginfo-0:1-3.el8_9.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_5_1-debuginfo-0:1-3.el8_9.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_5_1-debugsource-0:1-3.el8_9.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_5_1-debugsource-0:1-3.el8_9.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_9_1-0:1-2.el8_9.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_9_1-0:1-2.el8_9.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_9_1-0:1-2.el8_9.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_9_1-debuginfo-0:1-2.el8_9.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_9_1-debuginfo-0:1-2.el8_9.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_9_1-debugsource-0:1-2.el8_9.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-513_9_1-debugsource-0:1-2.el8_9.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)

✅ 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: To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~ Workaround: Mitigation for this issue is to skip loading the affected module sch_qfq onto the system until we have a fix available. This can be done by a blacklist mechanism and will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~ 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. Workaround: To mitigate this issue, prevent module tls from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.

🔗 References (7)