RHSA-2024:1746HighCVSS 8.1

Red Hat Security Advisory: kernel security update

Published
April 10, 2024
Last Modified
August 6, 2026

🔗 CVE IDs covered (3)

CVE-2023-4623 →CVE-2022-42896 →CVE-2023-2002 →

📋 Description

CVE-2022-42896 — kernel: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c CVE-2023-2002 — Kernel: bluetooth: Unauthorized management command execution CVE-2023-4623 — kernel: net/sched: sch_hfsc UAF

🎯 Affected products29

  • Red Hat Enterprise Linux Server AUS (v. 7.7)
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • bpftool-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • bpftool-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • bpftool-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-0:3.10.0-1062.87.1.el7.src as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-abi-whitelists-0:3.10.0-1062.87.1.el7.noarch as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debug-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debug-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debug-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-debug-devel-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-debuginfo-common-x86_64-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-debuginfo-common-x86_64-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-devel-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-doc-0:3.10.0-1062.87.1.el7.noarch as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-tools-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-tools-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-tools-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • kernel-tools-libs-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • kernel-tools-libs-devel-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • perf-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • perf-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • perf-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server Optional AUS (v. 7.7)
  • python-perf-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • python-perf-debuginfo-0:3.10.0-1062.87.1.el7.x86_64 as a component of Red Hat Enterprise Linux Server AUS (v. 7.7)
  • python-perf-debuginfo-0:3.10.0-1062.87.1.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: 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 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 the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~

🔗 References (6)