RHSA-2023:5628HighCVSS 7.8

Red Hat Security Advisory: kernel security and bug fix update

Published
October 10, 2023
Last Modified
July 30, 2026

🔗 CVE IDs covered (5)

CVE-2023-3776 →CVE-2023-4128 · pendingCVE-2023-1095 →CVE-2023-1637 →CVE-2023-3609 →

📋 Description

CVE-2023-1095 — kernel: netfilter: NULL pointer dereference in nf_tables due to zeroed list head CVE-2023-1637 — kernel: save/restore speculative MSRs during S3 suspend/resume CVE-2023-3609 — kernel: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails CVE-2023-3776 — kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function CVE-2023-4128 — kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route

🎯 Affected products149

  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • bpftool-0:4.18.0-305.108.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-0:4.18.0-305.108.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-0:4.18.0-305.108.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-0:4.18.0-305.108.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • bpftool-0:4.18.0-305.108.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-0:4.18.0-305.108.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.108.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-0:4.18.0-305.108.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-0:4.18.0-305.108.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-0:4.18.0-305.108.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-0:4.18.0-305.108.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-0:4.18.0-305.108.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-0:4.18.0-305.108.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-0:4.18.0-305.108.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-0:4.18.0-305.108.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-0:4.18.0-305.108.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-abi-stablelists-0:4.18.0-305.108.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-abi-stablelists-0:4.18.0-305.108.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-abi-stablelists-0:4.18.0-305.108.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-core-0:4.18.0-305.108.1.el8_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-core-0:4.18.0-305.108.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-core-0:4.18.0-305.108.1.el8_4.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • +119 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 preventing the affected netfilter kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278. Workaround: To mitigate this issue, prevent module cls_u32 from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. Workaround: To mitigate this issue, prevent module cls_fw from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.

🔗 References (8)