CVE-2026-72313
Description
In the Linux kernel, the following vulnerability has been resolved: drm/fb-helper: Only consider active CRTCs for vblank sync Only synchronize fbdev output to the vblank of an active CRTC. Go over the list of CRTCs and pick the first that matches. Fixes warnings as the one shown below [ 77.201354] WARNING: drivers/gpu/drm/drm_vblank.c:1320 at drm_crtc_wait_one_vblank+0x194/0x1cc [drm], CPU#1: kworker/1:7/1867 [ 77.201354] omapdrm omapdrm.0: [drm] vblank wait timed out on crtc 0 This currently happens if the fbdev output is not on CRTC 0. Atomic and non-atomic drivers require distinct code paths. As for other fbdev operations, implement both and select the correct one at runtime. Not finding an active CRTC is not a bug. Do not wait in this case, but flush the display update as before. v4: - avoid possible deadlocks with locking context (Sashiko) v3: - drop excessive state validation (Jani) - acquire plane and CRTC mutices (Sashiko) v2: - move look-up code into separate helper - support drivers with legacy modesetting v1: - see https://lore.kernel.org/dri-devel/[email protected]/
How to fix
- Linux Linux7d84acf641afb68aa8efe40815ef43779ddb12fd, 06c2b8d7ea2bcb014dd974fc3bc6d128d65d7477 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | d8c4bddcd8bcb41885d3db2ba18c840c411564c2 ≤ v < 7d84acf641afb68aa8efe40815ef43779ddb12fd, d8c4bddcd8bcb41885d3db2ba18c840c411564c2 ≤ v < 06c2b8d7ea2bcb014dd974fc3bc6d128d65d7477, 6.19 | 7d84acf641afb68aa8efe40815ef43779ddb12fd, 06c2b8d7ea2bcb014dd974fc3bc6d128d65d7477 |
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