Bug 2422673 (CVE-2025-40360)

Summary:	CVE-2025-40360 kernel: Linux kernel drm/sysfb: Denial of service via NULL pointer dereference
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	Keywords:	Security
Target Milestone:	---
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in the Linux kernel's `drm/sysfb` component. A local user could exploit this vulnerability by triggering a NULL pointer dereference in the `__drm_gem_reset_shadow_plane()` function. This can lead to a system crash, resulting in a denial of service.	Story Points:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-12-16 14:02:43 UTC

In the Linux kernel, the following vulnerability has been resolved:

drm/sysfb: Do not dereference NULL pointer in plane reset

The plane state in __drm_gem_reset_shadow_plane() can be NULL. Do not
deref that pointer, but forward NULL to the other plane-reset helpers.
Clears plane->state to NULL.

v2:
- fix typo in commit description (Javier)

Comment 1 Alexander B 2025-12-17 04:08:15 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121644-CVE-2025-40360-28d0@gregkh/T