CVE-2026-64428

kernel: gpio: sch: use raw_spinlock_t in the irq startup path

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · July 25, 2026

Updated · September 9, 2026

Description

A flaw was found in the Linux kernel's GPIO (General Purpose Input/Output) SCH controller. When the PREEMPT_RT (Preemptible Real-Time) feature is enabled, a locking mechanism intended for sleeping contexts is incorrectly used within a non-sleepable interrupt setup path. This can lead to a system crash, resulting in a denial of service.

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-663 · Use of a Non-reentrant Function in a Concurrent Context