LiveActive security incident?Get immediate response
CVE Record

CVE-2025-21819: Revert "drm/amd/display: Use HW lock mgr for PSR1"

In the Linux kernel, the following vulnerability has been resolved: Revert "drm/amd/display: Use HW lock mgr for PSR1" This reverts commit a2b5a9956269 ("drm/amd/display: Use HW lock mgr for PSR1") Because it may cause system hang while connect with two edp panel.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can make some AMD display systems hang when connected with two embedded DisplayPort panels. The impact described is availability, not data theft or remote compromise. Business urgency depends on whether affected kernel builds run on laptops, kiosks, workstations, or appliances using that display configuration.

Executive priority

Handle through normal patch management, with higher priority for business-critical Linux endpoints or appliances matching the AMD dual-panel display condition. There is no source-backed evidence of active exploitation, but repeated hangs can create operational disruption.

Technical view

The vulnerability is a Linux DRM/AMD display regression fixed by reverting commit a2b5a9956269, which used the hardware lock manager for PSR1. The stated failure mode is a system hang with two eDP panels. The source bundle provides no CVSS, CWE, exploit detail, or complete affected-range clarity.

Likely exposure

Exposure appears limited to Linux systems using the AMD display driver path and the two-eDP-panel condition described by the kernel fix. Organizations should prioritize hardware fleets where display hangs affect operations, support, or device availability.

Exploitation context

The source bundle does not cite active exploitation, and KEV is false. The available evidence points to a reliability-triggered system hang rather than a known remotely exploitable attack path. Exploitability details are incomplete.

Researcher notes

Research should focus on affected kernel version mapping and the AMD DRM PSR1 hardware-lock change. The CVE data is sparse: no CVSS, CWE, exploit status, or detailed trigger analysis beyond the two-eDP-panel hang statement.

Mitigation direction

  • Check vendor kernel advisories for affected and fixed package versions.
  • Prioritize kernel updates on AMD display systems with dual eDP panels.
  • Use distribution security updates rather than direct kernel deployment where possible.
  • Track Debian LTS guidance if using Debian-supported kernels.
  • Avoid inventing workarounds; follow Linux or distribution guidance.

Validation and detection

  • Inventory Linux kernel versions across affected hardware fleets.
  • Identify systems using AMD display components and embedded DisplayPort panels.
  • Compare installed kernels against vendor or distribution fixed versions.
  • Review incident reports for unexplained display-related hangs.
  • Confirm updates include the referenced stable kernel revert commits.
Prepared
Confidence
medium
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2025-21819 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
1ADP providers
7Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxb7d2461858ac75c9d6bc4ab8af1a738d0814b716, 758abba3dd413dc5de2016f8588403294263a30a, 4b46fc30b37e457d25cf3908c0c4dc3fbedd2044, b5c764d6ed556c4e81fbe3fd976da77ec450c08e, b5c764d6ed556c4e81fbe3fd976da77ec450c08e, 6.1.128, 6.6.75, 6.12.12unaffected
LinuxLinux6.13, 0, 6.1.129, 6.6.78, 6.12.14, 6.13.3, 6.14affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.