CVE-2025-37808: Linux kernel · crypto: null – Use spin lock instead of mutex
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 5 Nov 2026, 21:49 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 8 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 5 Nov 2026.
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: null - Use spin lock instead of mutex As the null algorithm may be freed in softirq context through af_alg, use spin locks instead of mutexes to protect the default null algorithm.
References
- git.kernel.org/stable/c/f7a5a5c8e1ec16a4b2041398abe95de0e14572ef (opens in a new tab)
- git.kernel.org/stable/c/e307c54ac8198bf09652c72603ba6e6d97798410 (opens in a new tab)
- git.kernel.org/stable/c/1dd4a8561d85dea545cf93f56efc48df8176e218 (opens in a new tab)
- git.kernel.org/stable/c/e27244cbe10658a66b8775be7f0acc4ad2f618d6 (opens in a new tab)
- git.kernel.org/stable/c/1b66a5920b7fc7cc6251192a3fcad115b6d75dd5 (opens in a new tab)
- git.kernel.org/stable/c/0486de3c1b8223138dcc614846bd76364f758de6 (opens in a new tab)
- git.kernel.org/stable/c/8cf2945512a8c0ef74ddd5b5a4f6b6a2fb1a4efb (opens in a new tab)
- git.kernel.org/stable/c/dcc47a028c24e793ce6d6efebfef1a1e92f80297 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/05/msg00045.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/05/msg00030.html (opens in a new tab)