CVE-2022-2938

kernel: use-after-free when psi trigger is destroyed while being polled

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Severity

Moderate

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · January 10, 2022

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel’s implementation of Pressure Stall Information. While the feature is disabled by default, it could allow an attacker to crash the system or have other memory-corruption side effects.

Statement

The Pressure Stall Subsystem (PSI) is disabled by default on Red Hat kernels, if the feature has not been explicitly enabled using a kernel boot time parameter of 'psi=1', the system is not affected.

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