CVE-2025-39964 Affecting kernel-uek-modules-deprecated package, versions <0:6.12.0-104.43.4.3.el9uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.03% (9th percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELUEKMODULESDEPRECATED-13710206
  • published25 Oct 2025
  • disclosed13 Oct 2025

Introduced: 13 Oct 2025

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

How to fix?

Upgrade Oracle:9 kernel-uek-modules-deprecated to version 0:6.12.0-104.43.4.3.el9uek or higher.
This issue was patched in ELSA-2025-20719.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-modules-deprecated package and not the kernel-uek-modules-deprecated package as distributed by Oracle. See How to fix? for Oracle: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