CVE-2025-21819: linux kernel — Fix

Description

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.6.75 — 6.6.78
linux	linux_kernel	6.12.12 — 6.12.14
linux	linux_kernel	6.13.1 — 6.13.3
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/915697c2e69ac8d14dad498e6d6f43dbb7de3787 https://git.kernel.org/stable/c/95c75578c420110c43791295985abb961d6dc033 https://git.kernel.org/stable/c/a978864653e45d2671f99b09afcc1110e45d3dd9 https://git.kernel.org/stable/c/dcc3f2c06d80da39eee742b51ddf0781affb260c https://git.kernel.org/stable/c/f245b400a223a71d6d5f4c72a2cb9b573a7fc2b6

Other References

https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html

Frequently Asked Questions

What is CVE-2025-21819? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-21819? +

CVE-2025-21819 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-21819? +

CVE-2025-21819 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-21819? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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