CVE-2026-80542 PUBLISHED

drm/amd/display: Fix NULL pointer dereference in amdgpu_dm_crtc_set_vblank()

Assigner: Linux
Reserved: 26.08.2026 Published: 26.08.2026 Updated: 26.08.2026

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)

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 34d66bc7ff10e146a4cec76cf286979740a10954 to 5045fb4c70bfde36a05e0f41cf35ddfb6d85d3af (excl.)
  • affected from 34d66bc7ff10e146a4cec76cf286979740a10954 to 4a6bc92fac30070511d66bcce4ed9b7dac983180 (excl.)
  • affected from 34d66bc7ff10e146a4cec76cf286979740a10954 to f2a1c4c6fe0a6fcde02e59dde546dba28d283635 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.18 is affected
  • unaffected from 0 to 6.18 (excl.)
  • unaffected from 6.18.46 to 6.18.* (incl.)
  • unaffected from 7.1.10 to 7.1.* (incl.)
  • unaffected from 7.2 to * (incl.)

References