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Advisory severityHigh7.8Red Hat Linux

High [CVE-2023-4004] Kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove

This high-severity Red Hat Linux advisory covers CVE-2023-4004 affecting Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.2 Telecommunications Update Service, Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2023-4004 Source published Source updated

VulniPulse record published

CVE-2023-4004
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

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Summary

A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their privileges on the system.

Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-416.

Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.2 Telecommunications Update Service; Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Telecommunications Update Service; Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.0 Extended Update Support; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8.

Red Hat lists Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7 as not affected.

Affected products named by the advisory: Red Hat package: kernel-rt.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

Fixed versions
  • kernel-rt-0:4.18.0-477.27.1.rt7.290.el8_8
  • kpatch-patch
  • kernel-0:4.18.0-477.27.1.el8_8
  • kernel-0:4.18.0-193.119.1.el8_2
  • kernel-rt-0:4.18.0-193.119.1.rt13.170.el8_2
  • kernel-0:4.18.0-305.103.1.el8_4
  • kernel-rt-0:4.18.0-305.103.1.rt7.178.el8_4
  • kernel-0:4.18.0-372.75.1.el8_6
  • kernel-0:5.14.0-284.30.1.el9_2
  • kernel-rt-0:5.14.0-284.30.1.rt14.315.el9_2
  • kernel-0:5.14.0-70.80.1.el9_0
  • kernel-rt-0:5.14.0-70.80.1.rt21.151.el9_0
  • RHSA-2023:5255
  • RHSA-2023:5221
  • RHSA-2023:5244
  • RHSA-2023:7434
  • RHSA-2023:7431
  • RHSA-2023:7417
  • RHSA-2023:4962
  • RHSA-2023:4961
  • RHSA-2023:4967
  • RHSA-2023:5548
  • RHSA-2023:5627
  • RHSA-2023:5069
  • RHSA-2023:5091
  • RHSA-2023:5093
  • RHSA-2023:7382
  • RHSA-2023:7389
  • RHSA-2023:7411

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • 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.

Official advisory · high-confidence parse· fetched 5 days ago·verify at source

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