Bug 2422702 (CVE-2025-40354) - CVE-2025-40354 kernel: Linux kernel: Privilege escalation in AMD display driver
Summary: CVE-2025-40354 kernel: Linux kernel: Privilege escalation in AMD display driver
Keywords:
Status: NEW
Alias: CVE-2025-40354
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-16 14:04 UTC by OSIDB Bzimport
Modified: 2026-08-13 14:58 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2025-12-16 14:04:56 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: increase max link count and fix link->enc NULL pointer access

[why]
1.) dc->links[MAX_LINKS] array size smaller than actual requested.
max_connector + max_dpia + 4 virtual = 14.
increase from 12 to 14.

2.) hw_init() access null LINK_ENC for dpia non display_endpoint.

(cherry picked from commit d7f5a61e1b04ed87b008c8d327649d184dc5bb45)
Comment 1 Alexander B 2025-12-17 01:54:37 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121637-CVE-2025-40354-b9bd@gregkh/T
Note You need to log in before you can comment on or make changes to this bug.