CVE-2026-68236 drm/amd/display: set new_stream to NULL after release
A use-after-free vulnerability in the Linux kernel's AMD display driver allows attackers to potentially execute code or escalate privileges via a double release error.
- 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-2026-68236?
CVE-2026-68236 is a high-severity use after free vulnerability in Linux, published on 10 Aug 2026. 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:
drm/amd/display: set new_stream to NULL after release
In dm_update_crtc_state(), the skip_modeset path releases new_stream via dc_stream_release() but does not set the pointer to NULL.
If a later error (e.g., color management failure) triggers the fail label, the error path calls dc_stream_release() again on the same dangling pointer, causing a double release and potential use-after-free.
Fix this by setting new_stream to NULL after the initial release.
(cherry picked from commit 99f3af19073b3ddbfd96e789124cce12c4277b28)
Weakness: CWE-415
Which versions are affected by CVE-2026-68236?
How do I fix CVE-2026-68236?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-68236 being exploited?
There is no known exploitation of CVE-2026-68236 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68236, DEBIAN-CVE-2026-68236, GHSA-mrj4-jj6w-2fxx, UBUNTU-CVE-2026-68236.