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VulnerabilityPublished Updated

CVE-2024-26925: Linux kernel · netfilter: nf_tables: release mutex after nft_gc_seq_end from abort path

Affects Linux kernelSource GCVE Database

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Not known to be exploited · CVSS 7.8 High · fixed in 5.4.0-1127.137~18.04.2 : patch Linux kernel soon.

Data as of 12 Nov 2026, 19:03 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 5.4.0-1127.137~18.04.2, 5.4.0-1132.139~18.04.1, 5.4.0-1132.141~18.04.1 +77
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Apr 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-38.38
Fixed in
  • 6.8.0-38.38
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1011.12
Fixed in
  • 6.8.0-1011.12
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1010.10
Fixed in
  • 6.8.0-1010.10
Ubuntu 24.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1010.11
Fixed in
  • 6.8.0-1010.11
Ubuntu 24.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1006.9
Fixed in
  • 6.8.0-1006.9
Ubuntu 24.04 LTSlinux-ibmpkg:deb/ubuntu/linux-ibm?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1008.8
Fixed in
  • 6.8.0-1008.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available and should be applied promptly. Ubuntu has released fixed kernel versions that address this issue. Users should update their Linux kernel packages to the fixed versions listed in the vendor advisories and reboot their systems to apply the changes. Due to ABI changes, recompilation and reinstallation of third-party kernel modules may be required. No additional mitigation steps are necessary beyond applying the official updates.

Description

CVE-2024-26925 is a high-severity vulnerability in the Linux kernel's netfilter nf_tables subsystem. It involves improper mutex handling during garbage collection sequences, where the commit mutex is released prematurely in the abort path. This flaw could allow asynchronous garbage collection workers to access expired objects while holding a released lock, potentially leading to system compromise. The issue affects multiple Linux kernel versions used in Ubuntu distributions. Official patches have been released to correct the mutex handling and prevent exploitation.

References

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