RHSA-2024:3530HighCVSS 7.8

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

Published
May 31, 2024
Last Modified
August 6, 2026

🔗 CVE IDs covered (2)

CVE-2024-1086 →CVE-2023-52578 →

📋 Description

CVE-2023-52578 — kernel: net: bridge: data races indata-races in br_handle_frame_finish() CVE-2024-1086 — kernel: nf_tables: use-after-free vulnerability in the nft_verdict_init() function

🎯 Affected products32

  • Red Hat Enterprise Linux NFV TUS (v.8.4)
  • Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-0:4.18.0-305.131.1.rt7.207.el8_4.src as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-0:4.18.0-305.131.1.rt7.207.el8_4.src as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-core-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-core-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-core-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-core-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-debuginfo-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-debuginfo-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-devel-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-devel-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-kvm-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-modules-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-modules-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-modules-extra-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-modules-extra-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debuginfo-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debuginfo-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debuginfo-common-x86_64-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debuginfo-common-x86_64-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-devel-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-devel-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-kvm-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-modules-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-modules-0:4.18.0-305.131.1.rt7.207.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • +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: 1. This flaw can be mitigated by preventing the affected netfilter (nf_tables) kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278. 2. If the module cannot be disabled, on non-containerized deployments of Red Hat Enterprise Linux, the mitigation is to disable user namespaces: ``` # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf ``` On containerized deployments, such as Red Hat OpenShift Container Platform, do not use the second mitigation (disabling user namespaces) as the functionality is needed to be enabled. The first mitigation (blacklisting nf_tables) is still viable for containerized deployments, providing the environment is not using netfilter.

🔗 References (5)