CVE-2023-2235

kernel: use-after-free vulnerability in the perf_group_detach function of the Linux Kernel Performance Events

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Severity

Important

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · March 15, 2023

Updated · August 7, 2026

Description

The Linux kernel's Performance Events subsystem has a use-after-free flaw that occurs when a user triggers the perf_group_detach and remove_on_exec functions simultaneously. This flaw allows a local user to crash or potentially escalate their privileges on the system.

Statement

The Red Hat Enterprise Linux 8.4 version is not affected by this flaw, as the vulnerable code was introduced in later versions of the Linux Kernel and was not backported to older releases.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-416 · Use After Free