Use After Free Affecting kernel-64k-debug-modules-core package, versions <0:5.14.0-284.18.1.el9_2


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL9-KERNEL64KDEBUGMODULESCORE-5539168
  • published2 May 2023
  • disclosed15 Mar 2023

Introduced: 15 Mar 2023

CVE-2023-2235  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:9 kernel-64k-debug-modules-core to version 0:5.14.0-284.18.1.el9_2 or higher.
This issue was patched in RHSA-2023:3723.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-debug-modules-core package and not the kernel-64k-debug-modules-core package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation.

The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability.

We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.

CVSS Scores

version 3.1