VYPR
Medium severity5.5NVD Advisory· Published Oct 4, 2025· Updated May 12, 2026

CVE-2025-39931

CVE-2025-39931

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.

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Affected products

127

Patches

Vulnerability mechanics

References

6

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