CVEvulnerability
CVE-2026-80786
- Status
- Received
- Published
- 2026-09-04
- Last modified
- 2026-10-21
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
fbdev: Wrap user-invoked calls to fb_set_var() in helper
Handle fbcon during display updates in fb_set_var_from_user(). Check
with fbcon if the mode change is possible, update hardware state and
finally update fbcon. Update all callers.
Only the FBIOPUT_VSCREENINFO ioctl currently does all steps. Other
mode-changes callers in sysfs and driver code are missing fbcon-related
steps.
With the new helper, ps3fb and sh_mobile_lcdcfb no longer maintain
fbcon state themselves.
References
- https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3 git.kernel.org
- https://git.kernel.org/stable/c/3130e7bf43ecfe3a15bcf90b9698e0764a2d8d08 git.kernel.org
- https://git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e git.kernel.org
- https://git.kernel.org/stable/c/d33589eff3d40439b3c83e8da0d07d20df797d50 git.kernel.org
- https://git.kernel.org/stable/c/ed7e9715849abd0816b8487b0d12ebd05d6e938b git.kernel.org