CVE-2025-39727 Affecting kernel-uek package, versions <0:6.12.0-104.43.4.2.el9uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.03% (6th percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELUEK-13568957
  • published16 Oct 2025
  • disclosed7 Sept 2025

Introduced: 7 Sep 2025

CVE-2025-39727  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-uek to version 0:6.12.0-104.43.4.2.el9uek or higher.
This issue was patched in ELSA-2025-20662.

NVD Description

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

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