CVE-2025-21819 Revert "drm/amd/display: Use HW lock mgr for PSR1"
A regression in the Linux kernel AMD display driver causes system hangs when connecting two eDP panels, requiring a patch to restore stability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-21819?
CVE-2025-21819 is a medium-severity denial of service vulnerability in Linux kernel, published on 27 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-21819?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-21819?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-21819 being exploited?
There is no known exploitation of CVE-2025-21819 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-21819, DEBIAN-CVE-2025-21819, GHSA-5h7r-vm4m-qxq6, ROOT-OS-UBUNTU-2204-CVE-2025-21819, ROOT-OS-UBUNTU-2404-CVE-2025-21819, UBUNTU-CVE-2025-21819.