RHSA-2024:3462MediumCVSS 7.0

Red Hat Security Advisory: kernel security and bug fix update

Published
May 29, 2024
Last Modified
November 5, 2026

🔗 CVE IDs covered (3)

CVE-2021-47013 →CVE-2023-3006 →CVE-2023-52578 →

📋 Description

CVE-2021-47013 — kernel: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send CVE-2023-3006 — RHEL: Add Spectre-BHB mitigation for AmpereOne CVE-2023-52578 — kernel: net: bridge: data races indata-races in br_handle_frame_finish()

🎯 Affected products132

  • Red Hat CodeReady Linux Builder EUS (v.8.6)
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • Red Hat Virtualization 4 Hypervisor for RHEL 8
  • bpftool-0:4.18.0-372.105.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-0:4.18.0-372.105.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-0:4.18.0-372.105.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-0:4.18.0-372.105.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.105.1.el8_6.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.105.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.105.1.el8_6.ppc64le as a component of Red Hat CodeReady Linux Builder EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.105.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.105.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.105.1.el8_6.x86_64 as a component of Red Hat CodeReady Linux Builder EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.105.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.105.1.el8_6.x86_64 as a component of Red Hat Virtualization 4 Hypervisor for RHEL 8
  • kernel-0:4.18.0-372.105.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-0:4.18.0-372.105.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-0:4.18.0-372.105.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-0:4.18.0-372.105.1.el8_6.src as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-0:4.18.0-372.105.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-abi-stablelists-0:4.18.0-372.105.1.el8_6.noarch as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-core-0:4.18.0-372.105.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-core-0:4.18.0-372.105.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-core-0:4.18.0-372.105.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-core-0:4.18.0-372.105.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-0:4.18.0-372.105.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-0:4.18.0-372.105.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-0:4.18.0-372.105.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-0:4.18.0-372.105.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-core-0:4.18.0-372.105.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • +102 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: Disabling unprivileged eBPF effectively mitigates the known attack vectors for exploiting intra-mode branch injections attacks. The default Red Hat Enterprise Linux kernel prevents unprivileged users from being able to use eBPF by the kernel.unprivileged_bpf_disabled sysctl. For the Red Hat Enterprise Linux 7, the eBPF for unprivileged users is always disabled. For the Red Hat Enterprise Linux 8 to confirm the current state, inspect the sysctl with the command: # cat /proc/sys/kernel/unprivileged_bpf_disabled The setting of 1 would mean that unprivileged users can not use eBPF, mitigating the flaw.

🔗 References (6)