CVE-2026-80786 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Linux	Linux Kernel

No data.

No data.

References

Link	Providers
https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3
https://git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e

History

Fri, 04 Sep 2026 17:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-665

Fri, 04 Sep 2026 15:30:00 +0000

Type	Values Removed	Values Added
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.
Title		fbdev: Wrap user-invoked calls to fb_set_var() in helper
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3 https://git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-09-04T15:12:57.927Z

Updated: 2026-09-07T14:21:11.656Z

Reserved: 2026-08-26T14:34:25.793Z

Link: CVE-2026-80786

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-09-04T16:18:04.580

Modified: 2026-09-07T15:17:32.617

Link: CVE-2026-80786

Redhat

No data.

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