CVE-2025-39964

HIGH

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 v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 10/13/2025Modified: 9/19/2026

Related Intelligence (0)

No articles currently reference this CVE.

References (9)

https://git.kernel.org/stable/c/0f28c4adbc4a97437874c9b669fd7958a8c6d6cePatchhttps://git.kernel.org/stable/c/1b34cbbf4f011a121ef7b2d7d6e6920a036d5285Patchhttps://git.kernel.org/stable/c/1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8Patchhttps://git.kernel.org/stable/c/45bcf60fe49b37daab1acee57b27211ad1574042Patchhttps://git.kernel.org/stable/c/7c4491b5644e3a3708f3dbd7591be0a570135b84Patchhttps://git.kernel.org/stable/c/9aee87da5572b3a14075f501752e209801160d3dPatchhttps://git.kernel.org/stable/c/e4c1ec11132ec466f7362a95f36a506ce4dc08c9Patchhttps://cert-portal.siemens.com/productcert/html/ssa-019113.htmlThird Party Advisoryhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-39964US Government Resource