CVE-2025-39727 Affecting kernel-64k package, versions <0:6.12.0-55.41.1.el10_0


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.03% (6th percentile)

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  • Snyk IDSNYK-ROCKY10-KERNEL64K-13815970
  • published3 Nov 2025
  • disclosed7 Sept 2025

Introduced: 7 Sep 2025

CVE-2025-39727  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:10 kernel-64k to version 0:6.12.0-55.41.1.el10_0 or higher.
This issue was patched in RLSA-2025:19106.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k package and not the kernel-64k package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

mm: swap: fix potential buffer overflow in setup_clusters()

In setup_swap_map(), we only ensure badpages are in range (0, last_page]. As maxpages might be < last_page, setup_clusters() will encounter a buffer overflow when a badpage is >= maxpages.

Only call inc_cluster_info_page() for badpage which is < maxpages to fix the issue.

CVSS Base Scores

version 3.1