CVE-2026-80542 drm/amd/display: Fix NULL pointer dereference in amdgpu_dm_crtc_set_vblank()
A local attacker can cause a kernel crash via NULL pointer dereference in the AMD GPU display driver when querying vblank sequences.
- 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-2026-80542?
CVE-2026-80542 is a vulnerability in Linux, published on 26 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: Fix NULL pointer dereference in amdgpu_dm_crtc_set_vblank()
amdgpu_dm_crtc_set_vblank() dereferences acrtc_state->stream when vblank is enabled/queried from DRM_IOCTL_MODE_CRTC_GET_SEQUENCE before a stream is attached to it.
BUG: kernel NULL pointer dereference, address: 0000000000000008 RIP: amdgpu_dm_crtc_set_vblank+0x6b/0x4d0 [amdgpu] Call Trace: drm_vblank_enable drm_vblank_get drm_crtc_get_sequence_ioctl drm_ioctl_kernel drm_ioctl
Reproduced by running VKCTS with WSI tests enabled on RADV.
Guard the enable path on acrtc_state->stream being non-NULL, matching the existing checks in this function.
(cherry picked from commit 7b1b31bf6942e6f43509b48da23f8e27269aac39)
Which versions are affected by CVE-2026-80542?
How do I fix CVE-2026-80542?
Apply the vendor's patch.
Is CVE-2026-80542 being exploited?
There is no known exploitation of CVE-2026-80542 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80542, DEBIAN-CVE-2026-80542, UBUNTU-CVE-2026-80542.