RHSA-2024:0999HighCVSS 7.8

Red Hat Security Advisory: kernel security update

Published
February 27, 2024
Last Modified
July 30, 2026

🔗 CVE IDs covered (4)

CVE-2023-4921 →CVE-2023-42753 →CVE-2023-45871 →CVE-2023-3609 →

📋 Description

CVE-2023-3609 — kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails CVE-2023-4921 — kernel: use-after-free in sch_qfq network scheduler CVE-2023-42753 — kernel: netfilter: potential slab-out-of-bound access due to integer underflow CVE-2023-45871 — kernel: IGB driver inadequate buffer size for frames larger than MTU

🎯 Affected products29

  • Red Hat Enterprise Linux Server AUS (v. 7.7)
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • bpftool-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • bpftool-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • bpftool-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-0:3.10.0-1062.85.1.el7.src as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-abi-whitelists-0:3.10.0-1062.85.1.el7.noarch as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debug-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debug-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debug-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-debug-devel-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-debuginfo-common-x86_64-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debuginfo-common-x86_64-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-devel-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-doc-0:3.10.0-1062.85.1.el7.noarch as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-tools-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-tools-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-tools-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-tools-libs-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-tools-libs-devel-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • perf-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • perf-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • perf-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • python-perf-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • python-perf-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • python-perf-debuginfo-0:3.10.0-1062.85.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)

✅ 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: To mitigate this issue, prevent module cls_u32 from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. 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: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible. 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 (7)