fbdev: Wrap user-invoked calls to fb_set_var() in helper

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80786
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-04 16:18:04 UTC
Updated2026-09-07 15:17:32 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001550000 probability, percentile 0.050020000 (date 2026-09-07)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 07f7e46833f71472e30da54a50dacdf48521bdd3 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 6f611e5e5f3327cf2e2daabe6ee5acac58cc784e git Not specified
CNA Linux Linux affected 2.6.12 Not specified
CNA Linux Linux unaffected 2.6.12 semver Not specified
CNA Linux Linux unaffected 7.1.11 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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