CVE-2025-37747: Linux kernel · perf: Fix hang while freeing sigtrap event
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 14:06 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 1 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Linux Linux | Affected
| 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
- git.kernel.org/stable/c/20ab73bb467d900662dca043452aadecb2db8338 (opens in a new tab)
- git.kernel.org/stable/c/aae58a39ac4c63c3fa53536fb2504c9f1d0e1719 (opens in a new tab)
- git.kernel.org/stable/c/fa1827fa968c0674e9b6fca223fa9fb4da4493eb (opens in a new tab)
- git.kernel.org/stable/c/665b87b8f8b3aeb49083ef3b65c4953e7753fc12 (opens in a new tab)
- git.kernel.org/stable/c/1267bd38f161c1a27d9b722de017027167a225a0 (opens in a new tab)
- git.kernel.org/stable/c/56799bc035658738f362acec3e7647bb84e68933 (opens in a new tab)