CVE-2025-39964 Affecting kernel-64k-devel-matched package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

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  • Snyk IDSNYK-CENTOS9-KERNEL64KDEVELMATCHED-13546655
  • published14 Oct 2025
  • disclosed13 Oct 2025

Introduced: 13 Oct 2025

NewCVE-2025-39964  (opens in a new tab)

How to fix?

There is no fixed version for Centos:9 kernel-64k-devel-matched.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-devel-matched package and not the kernel-64k-devel-matched package as distributed by Centos. See How to fix? for Centos:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg

Issuing two writes to the same af_alg socket is bogus as the data will be interleaved in an unpredictable fashion. Furthermore, concurrent writes may create inconsistencies in the internal socket state.

Disallow this by adding a new ctx->write field that indiciates exclusive ownership for writing.

CVSS Base Scores

version 3.1