Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Set merge to zero early in af_alg_sendmsg If an error causes af_alg_sendmsg to abort, ctx->merge may contain a garbage value from the previous loop. This may then trigger a crash on the next entry into af_alg_sendmsg when it attempts to do a merge that can't be done. Fix this by setting ctx->merge to zero near the start of the loop.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.38, < 6.1.154 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/045ee26aa3920a47ec46d7fcb302420bf01fd753Patch
- https://git.kernel.org/stable/c/2374c11189ef704a3e4863646369f1b8e6a27d71Patch
- https://git.kernel.org/stable/c/24c1106504c625fabd3b7229611af617b4c27ac7Patch
- https://git.kernel.org/stable/c/6241b9e2809b12da9130894cf5beddf088dc1b8aPatch
- https://git.kernel.org/stable/c/9574b2330dbd2b5459b74d3b5e9619d39299fc6fPatch
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
FAQ
What is CVE-2025-39931?
CVE-2025-39931 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Set merge to zero early in af_alg_sendmsg If an error causes af_alg_sendmsg to abort, ctx->merge may contain a ga...
How severe is CVE-2025-39931?
CVE-2025-39931 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-39931?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.