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VulnerabilityPublished Updated

CVE-2024-38630: Linux kernel · watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 15:33 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 21 Jun 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 30 Oct 2026.

What to do

AI-suggested

A fix has been implemented in the Linux kernel by replacing del_timer() with timer_shutdown_sync() in the cpu5wdt module. Users should apply the official kernel updates that include this fix once available.

Description

A use-after-free vulnerability was fixed in the Linux kernel's cpu5wdt watchdog module. The issue occurred when the timer handler cpu5wdt_trigger accessed a port region after it had been released, due to improper synchronization when removing the timer. The fix replaced del_timer() with timer_shutdown_sync() to ensure the timer handler completes before releasing the port region.

References

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