CVE-2025-39742 Affecting kernel-uek package, versions <0:5.4.17-2136.348.3.el8uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.04% (13th percentile)

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  • Snyk IDSNYK-ORACLE8-KERNELUEK-13540200
  • published13 Oct 2025
  • disclosed11 Sept 2025

Introduced: 11 Sep 2025

CVE-2025-39742  (opens in a new tab)

How to fix?

Upgrade Oracle:8 kernel-uek to version 0:5.4.17-2136.348.3.el8uek or higher.
This issue was patched in ELSA-2025-20663.

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:8 relevant fixed versions and status.

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

RDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask()

The function divides number of online CPUs by num_core_siblings, and later checks the divider by zero. This implies a possibility to get and divide-by-zero runtime error. Fix it by moving the check prior to division. This also helps to save one indentation level.

CVSS Base Scores

version 3.1