CVE-2025-39694 Affecting kernel-64k-devel-matched package, versions <0:5.14.0-570.46.1.el9_6


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.03% (6th percentile)

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  • Snyk IDSNYK-ALMALINUX9-KERNEL64KDEVELMATCHED-13156920
  • published30 Sept 2025
  • disclosed29 Sept 2025

Introduced: 29 Sep 2025

NewCVE-2025-39694  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 kernel-64k-devel-matched to version 0:5.14.0-570.46.1.el9_6 or higher.
This issue was patched in ALSA-2025:16398.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-devel-matched package and not the kernel-64k-devel-matched 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:

s390/sclp: Fix SCCB present check

Tracing code called by the SCLP interrupt handler contains early exits if the SCCB address associated with an interrupt is NULL. This check is performed after physical to virtual address translation.

If the kernel identity mapping does not start at address zero, the resulting virtual address is never zero, so that the NULL checks won't work. Subsequently this may result in incorrect accesses to the first page of the identity mapping.

Fix this by introducing a function that handles the NULL case before address translation.

CVSS Base Scores

version 3.1