Use After Free Affecting kernel-uek-modules-deprecated package, versions <0:6.12.0-102.36.5.2.el10uek


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.21% (11th percentile)

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  • Snyk IDSNYK-ORACLE10-KERNELUEKMODULESDEPRECATED-10857774
  • published20 Jul 2025
  • disclosed12 Mar 2025

Introduced: 12 Mar 2025

CVE-2025-21856  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Oracle:10 kernel-uek-modules-deprecated to version 0:6.12.0-102.36.5.2.el10uek or higher.
This issue was patched in ELSA-2025-20530.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-modules-deprecated package and not the kernel-uek-modules-deprecated package as distributed by Oracle. See How to fix? for Oracle:10 relevant fixed versions and status.

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

s390/ism: add release function for struct device

According to device_release() in /drivers/base/core.c, a device without a release function is a broken device and must be fixed.

The current code directly frees the device after calling device_add() without waiting for other kernel parts to release their references. Thus, a reference could still be held to a struct device, e.g., by sysfs, leading to potential use-after-free issues if a proper release function is not set.

CVSS Base Scores

version 3.1