RHSA-2023:4150HighCVSS 7.1

Red Hat Security Advisory: kernel-rt security and bug fix update

Published
July 18, 2023
Last Modified
November 7, 2026

🔗 CVE IDs covered (1)

CVE-2022-3564 →

📋 Description

CVE-2022-3564 — kernel: use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c

🎯 Affected products32

  • Red Hat Enterprise Linux for Real Time (v. 7)
  • Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-0:3.10.0-1160.95.1.rt56.1241.el7.src as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-0:3.10.0-1160.95.1.rt56.1241.el7.src as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-debug-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-debug-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-debug-debuginfo-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-debug-debuginfo-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-debug-devel-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-debug-devel-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-debug-kvm-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-debug-kvm-debuginfo-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-debuginfo-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-debuginfo-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-debuginfo-common-x86_64-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-debuginfo-common-x86_64-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-devel-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-devel-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-doc-0:3.10.0-1160.95.1.rt56.1241.el7.noarch as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-doc-0:3.10.0-1160.95.1.rt56.1241.el7.noarch as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-kvm-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-kvm-debuginfo-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-trace-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-trace-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-trace-debuginfo-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-trace-debuginfo-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • kernel-rt-trace-devel-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 7)
  • kernel-rt-trace-devel-0:3.10.0-1160.95.1.rt56.1241.el7.x86_64 as a component of Red Hat Enterprise Linux for Real Time for NFV (v. 7)
  • +2 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 The system must be rebooted for this update to take effect. Workaround: To mitigate these vulnerabilities on the operating system level, disable the Bluetooth functionality via blocklisting kernel modules in the Linux kernel. The kernel modules can be prevented from being loaded by using system-wide modprobe rules. Instructions on how to disable Bluetooth modules are available on the Customer Portal at 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.

🔗 References (4)