fbdev: Wrap user-invoked calls to fb_set_var() in helper
CVE-2026-80786 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-80786, released September 5, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 13.5 (trixie) | 6.12.115-2 | DEBIAN-CVE-2026-80786 | Sep 5, 2026 |
| linux · Debian 14 | 7.1.12-1 | DEBIAN-CVE-2026-80786 | Sep 5, 2026 |
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