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VulnerabilityPublished Updated

CVE-2024-42079: Linux kernel · gfs2: Fix NULL pointer dereference in gfs2_log_flush

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 10 Nov 2026, 14:50 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Jul 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 10 Nov 2026.

What to do

AI-suggested

Apply the official Linux kernel patch that sets sdp->sd_jdesc to NULL under the log flush lock and adds a NULL check in gfs2_log_flush. Since this is a kernel vulnerability, updating to a fixed kernel version is the recommended remediation.

Description

A NULL pointer dereference vulnerability in the gfs2_log_flush function of the Linux kernel has been fixed. The issue arises due to a race condition between outstanding glock work and an unmount operation, which can lead to dereferencing a NULL pointer. The fix involves setting sdp->sd_jdesc to NULL under the log flush lock and checking its value before dereferencing.

References

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