RHSA-2023:4961HighCVSS 7.8

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

Published
September 5, 2023
Last Modified
August 10, 2026

🔗 CVE IDs covered (8)

CVE-2023-3390 →CVE-2023-4004 →CVE-2023-35001 →CVE-2023-35788 →CVE-2023-1829 →CVE-2023-2002 →CVE-2023-2124 →CVE-2023-3090 →

📋 Description

CVE-2023-1829 — kernel: Use-after-free vulnerability in the Linux Kernel traffic control index filter CVE-2023-2002 — Kernel: bluetooth: Unauthorized management command execution CVE-2023-2124 — kernel: OOB access in the Linux kernel's XFS subsystem CVE-2023-3090 — kernel: ipvlan: out-of-bounds write caused by unclear skb->cb CVE-2023-3390 — kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests CVE-2023-4004 — kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove() CVE-2023-35001 — kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() CVE-2023-35788 — kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()

🎯 Affected products49

  • Red Hat Enterprise Linux NFV E4S (v.8.4)
  • Red Hat Enterprise Linux NFV TUS (v.8.4)
  • Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-0:4.18.0-305.103.1.rt7.178.el8_4.src as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • kernel-rt-0:4.18.0-305.103.1.rt7.178.el8_4.src as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-0:4.18.0-305.103.1.rt7.178.el8_4.src as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • kernel-rt-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-core-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • kernel-rt-core-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-core-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • kernel-rt-debug-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-core-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • kernel-rt-debug-core-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-core-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-debuginfo-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • kernel-rt-debug-debuginfo-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-debuginfo-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-devel-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • kernel-rt-debug-devel-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-devel-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-kvm-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • kernel-rt-debug-kvm-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-modules-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • kernel-rt-debug-modules-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV TUS (v.8.4)
  • kernel-rt-debug-modules-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux RT TUS (v.8.4)
  • kernel-rt-debug-modules-extra-0:4.18.0-305.103.1.rt7.178.el8_4.x86_64 as a component of Red Hat Enterprise Linux NFV E4S (v.8.4)
  • +19 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 this issue, prevent the module cls_tcindex from being loaded. Please see https://access.redhat.com/solutions/41278 on how to blacklist a kernel module to prevent it from loading automatically. Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: This flaw can be mitigated by preventing the affected `ipvlan` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278. 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, it is possible to prevent the affected code from being loaded by blacklisting the kernel netfilter module. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 Workaround: This flaw can be mitigated by preventing the affected `cls_flower` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.

🔗 References (11)