CVE-2025-39931
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedOct 4, 2025
First seenOct 4, 2025
How to fix
Update
- linux linux_kernel6.1.154, 6.6.108, 6.12.49, 6.16.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.38 ≤ v < 6.1.154, 6.2 ≤ v < 6.6.108, 6.7 ≤ v < 6.12.49, 6.13 ≤ v < 6.16.9, 6.17 | 6.1.154, 6.6.108, 6.12.49, 6.16.9 |
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