CVE-2025-39931
HIGH severity · CVSS 7.8 · CWE-908
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/045ee26aa3920a47ec46d7fcb302420bf01fd753 ↗
Additional information
- NVD record
- 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://git.kernel.org/stable/c/28f6f37abca7c5c9eb3959c66310f1d4d98b8aaf
- https://git.kernel.org/stable/c/db2b42425dfbde4983b0c20fb7cfa05f70e6a745
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html