RHSA-2023:5589HighCVSS 8.1

Red Hat Security Advisory: kernel security and bug fix update

Published
October 10, 2023
Last Modified
August 6, 2026

🔗 CVE IDs covered (2)

CVE-2022-42896 →CVE-2023-4128 · pending

📋 Description

CVE-2022-42896 — kernel: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c CVE-2023-4128 — kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route

🎯 Affected products100

  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
  • Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • Red Hat Enterprise Linux BaseOS TUS (v. 8.2)
  • bpftool-0:4.18.0-193.116.1.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • bpftool-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
  • bpftool-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • bpftool-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.116.1.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • bpftool-debuginfo-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v. 8.2)
  • kernel-0:4.18.0-193.116.1.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • kernel-0:4.18.0-193.116.1.el8_2.src as a component of Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
  • kernel-0:4.18.0-193.116.1.el8_2.src as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • kernel-0:4.18.0-193.116.1.el8_2.src as a component of Red Hat Enterprise Linux BaseOS TUS (v. 8.2)
  • kernel-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
  • kernel-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • kernel-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v. 8.2)
  • kernel-abi-whitelists-0:4.18.0-193.116.1.el8_2.noarch as a component of Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
  • kernel-abi-whitelists-0:4.18.0-193.116.1.el8_2.noarch as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • kernel-abi-whitelists-0:4.18.0-193.116.1.el8_2.noarch as a component of Red Hat Enterprise Linux BaseOS TUS (v. 8.2)
  • kernel-core-0:4.18.0-193.116.1.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • kernel-core-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
  • kernel-core-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • kernel-core-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v. 8.2)
  • kernel-debug-0:4.18.0-193.116.1.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • kernel-debug-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v. 8.2)
  • kernel-debug-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • kernel-debug-0:4.18.0-193.116.1.el8_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v. 8.2)
  • kernel-debug-core-0:4.18.0-193.116.1.el8_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v. 8.2)
  • +70 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: 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.

🔗 References (5)