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CVE Database›CVE-2025-21939

CVE-2025-21939

kernel: drm/xe/hmm: Don't dereference struct page pointers without notifier lock

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Severity

Moderate

Red Hat Product Security

6.1

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 xe HMM path. struct page pointers from hmm_range_fault() are used after the notifier lock is dropped, so the pages may no longer be mapped. A local user of that GPU 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 · 6.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CWE-667 · Improper Locking