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VulnerabilityPublished Updated

CVE-2025-37747: Linux kernel · perf: Fix hang while freeing sigtrap event

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 14:06 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 1 May 2025

  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

Affected software

ProductAffectedFixed in
Linux LinuxAffected
  • 5.15.165 – 6.10.3
4 affected builds
Fixed in–

AI-suggested

A fix for this issue has been implemented in Linux kernel versions 5.15.165, 6.1.103, 6.6.44, and 6.10.3. Users should update to these or later patched versions to resolve the hang. No additional mitigation steps are required beyond applying the official fix.

Description

A hang vulnerability in the Linux kernel's perf subsystem was fixed. The issue occurred when freeing a sigtrap event if a related deferred signal had not been sent before the file was closed, causing a hang during task work cancellation. The fix involves adjusting reference counting to prevent the hang without reintroducing leaks.

References

Community reviews

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