RHSA-2024:0980HighCVSS 8.1

Red Hat Security Advisory: kernel security update

Published
February 26, 2024
Last Modified
August 6, 2026

🔗 CVE IDs covered (3)

CVE-2023-4921 →CVE-2023-45871 →CVE-2022-42896 →

📋 Description

CVE-2022-42896 — kernel: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c 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

🎯 Affected products27

  • Red Hat Enterprise Linux Server AUS (v. 7.6)
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.6)
  • bpftool-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-0:3.10.0-957.111.1.el7.src as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-abi-whitelists-0:3.10.0-957.111.1.el7.noarch as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-debug-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-debug-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-debug-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.6)
  • kernel-debug-devel-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.6)
  • kernel-debuginfo-common-x86_64-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-debuginfo-common-x86_64-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.6)
  • kernel-devel-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-doc-0:3.10.0-957.111.1.el7.noarch as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-tools-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-tools-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-tools-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.6)
  • kernel-tools-libs-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • kernel-tools-libs-devel-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.6)
  • perf-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • perf-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • perf-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.6)
  • python-perf-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • python-perf-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.6)
  • python-perf-debuginfo-0:3.10.0-957.111.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.6)

✅ 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: This flaw can be mitigated by disabling Bluetooth on the operating system level. The kernel modules can be prevented from being loaded by using system-wide modprobe rules. For instructions on how to disable Bluetooth on RHEL please refer to https://access.redhat.com/solutions/2682931. Alternatively Bluetooth can be disabled within the hardware or at BIOS level which will also provide an effective mitigation as the kernel will not be able to detect that Bluetooth hardware is present on the system. 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.

🔗 References (6)