Review reviewHigh

CVE-2025-40354

Linux

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)

CVSS: 7.8
EPSS: -
CISA KEV: Not listed
Published: 2025.12.16

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < f28092be4e12b7df9e4f415d25bf0d767bc2d9ed, >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < a3fc0d36cfb927f8986b83bf5fba47dbedad3c63, >= 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c < bec947cbe9a65783adb475a5fb47980d7b4f4796, >= 4.15
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: Not available