Race Condition Affecting kernel-zfcpdump-core package, versions <0:5.14.0-687.50.1.el9_8


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

Exploit Maturity
Attacked
EPSS
1% (62nd percentile)

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  • Snyk IDSNYK-ALMALINUX9-KERNELZFCPDUMPCORE-20152255
  • published26 Sept 2026
  • disclosed22 Sept 2026

Introduced: 22 Sep 2026

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

How to fix?

Upgrade AlmaLinux:9 kernel-zfcpdump-core to version 0:5.14.0-687.50.1.el9_8 or higher.
This issue was patched in ALSA-2026:70459.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-zfcpdump-core package and not the kernel-zfcpdump-core package as distributed by AlmaLinux. See How to fix? for AlmaLinux: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