Race Condition Affecting kernel-debug-devel package, versions <0:5.14.0-687.50.1.el9_8


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

Exploit Maturity
Attacked
EPSS
1% (62nd percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELDEBUGDEVEL-20144951
  • published25 Sept 2026
  • disclosed13 Oct 2025

Introduced: 13 Oct 2025

CVE-2025-39964  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-debug-devel to version 0:5.14.0-687.50.1.el9_8 or higher.
This issue was patched in ELSA-2026-70459.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel package and not the kernel-debug-devel 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