Use After Free Affecting openshift/ose-rhel-coreos-9 package, versions *


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.13% (3rd percentile)

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  • Snyk IDSNYK-RHEL8-OPENSHIFTOSERHELCOREOS9-21954600
  • published30 Oct 2026
  • disclosed28 Oct 2026

Introduced: 28 Oct 2026

NewCVE-2026-99167  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 openshift/ose-rhel-coreos-9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openshift/ose-rhel-coreos-9 package and not the openshift/ose-rhel-coreos-9 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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

net/sched: fix use-after-free in __tcf_action_put()

__tcf_action_put() decrements the reference count before decrementing the binding count. Another thread can free the action between these operations, causing the binding-count update to access freed memory. KASAN reports it as:

BUG: KASAN: slab-use-after-free in __tcf_action_put+0x327/0x340 Write of size 4 at addr ff11000000d46420 by task tc-put-pause/64

Hold the action IDR mutex across both counter updates and IDR removal, keeping cleanup outside the lock.

CVSS Base Scores

version 3.1