CVE-2025-39964

low

Description

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.

References

https://docs.cloud.google.com/support/bulletins/index#gcp-2026-003

https://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9

https://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3d

https://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84

https://git.kernel.org/stable/c/45bcf60fe49b37daab1acee57b27211ad1574042

https://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8

https://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285

https://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6ce

Details

Source: Mitre, NVD

Published: 2025-10-13

Updated: 2026-02-03

Risk Information

CVSS v2

Base Score: 1.7

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 3.3

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Severity: Low

EPSS

EPSS: 0.00024