CVE-2025-39931 - CVE House
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Status published Unknown CVE-2025-39931

crypto: af_alg - Set merge to zero early in af_alg_sendmsg

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
8ff590903d5fc7f5a0a988c38267a3d08e6393a2, 2.6.38, 0, 5.10.260, 5.15.211, 6.1.154, 6.6.108, 6.12.49, 6.16.9, 6.17

Timeline

Official Publish: October 4th, 2025
Last Modified: July 14th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.