CVE-2025-39931
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.
Does this matter?
Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-908
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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/28f6f37abca7c5c9eb3959c66310f1d4d98b8aaf
- https://git.kernel.org/stable/c/6241b9e2809b12da9130894cf5beddf088dc1b8aPatch
- https://git.kernel.org/stable/c/9574b2330dbd2b5459b74d3b5e9619d39299fc6fPatch
- https://git.kernel.org/stable/c/db2b42425dfbde4983b0c20fb7cfa05f70e6a745
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.