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Use After Free Affecting kernel-uek-modules-wireless package, versions <0:6.12.0-204.92.4.2.el9uek

Severity

 Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-ORACLE9-KERNELUEKMODULESWIRELESS-17867856
  • published6 Jul 2026
  • disclosed8 May 2026
Report a new vulnerability Found a mistake?

Introduced: 8 May 2026

CVE-2026-43438  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Oracle:9 kernel-uek-modules-wireless to version 0:6.12.0-204.92.4.2.el9uek or higher.
This issue was patched in ELSA-2026-50372.

NVD Description

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

sched_ext: Remove redundant css_put() in scx_cgroup_init()

The iterator css_for_each_descendant_pre() walks the cgroup hierarchy under cgroup_lock(). It does not increment the reference counts on yielded css structs.

According to the cgroup documentation, css_put() should only be used to release a reference obtained via css_get() or css_tryget_online(). Since the iterator does not use either of these to acquire a reference, calling css_put() in the error path of scx_cgroup_init() causes a refcount underflow.

Remove the unbalanced css_put() to prevent a potential Use-After-Free (UAF) vulnerability.