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CVE-2025-21899

kernel: tracing: Fix bad hist from corrupting named_triggers list

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Severity

Moderate

Red Hat Product Security

6

CVSS 3.1

Review impact separately from score.

Published · April 1, 2025

Updated · October 21, 2026

Description

A flaw was found in the Linux kernel tracing histogram triggers. A failed hist trigger is still linked on the named-trigger list, and a later trigger with the same name walks that freed entry. A local user who can write trace triggers can crash the kernel.

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 · 6
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

CWE-416 · Use After Free