CVE-2026-80786
N/A
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 07f7e46833f71472e30da54a50dacdf48521bdd3 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6f611e5e5f3327cf2e2daabe6ee5acac58cc784e | affected |
| Linux | Linux | 0 < 7.1.11 | affected |
| Linux | Linux | 7.1.11 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3
- https://git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e
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