FKIE_CVE-2026-80786

Vulnerability from fkie_nvd - Published: 2026-09-04 16:18 - Updated: 2026-09-07 15:17
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/video/fbdev/core/fb_chrdev.c",
            "drivers/video/fbdev/core/fbcon.c",
            "drivers/video/fbdev/core/fbmem.c",
            "drivers/video/fbdev/core/fbsysfs.c",
            "drivers/video/fbdev/ps3fb.c",
            "drivers/video/fbdev/sh_mobile_lcdcfb.c",
            "include/linux/fb.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "07f7e46833f71472e30da54a50dacdf48521bdd3",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6f611e5e5f3327cf2e2daabe6ee5acac58cc784e",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/video/fbdev/core/fb_chrdev.c",
            "drivers/video/fbdev/core/fbcon.c",
            "drivers/video/fbdev/core/fbmem.c",
            "drivers/video/fbdev/core/fbsysfs.c",
            "drivers/video/fbdev/ps3fb.c",
            "drivers/video/fbdev/sh_mobile_lcdcfb.c",
            "include/linux/fb.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: Wrap user-invoked calls to fb_set_var() in helper\n\nHandle fbcon during display updates in fb_set_var_from_user(). Check\nwith fbcon if the mode change is possible, update hardware state and\nfinally update fbcon. Update all callers.\n\nOnly the FBIOPUT_VSCREENINFO ioctl currently does all steps. Other\nmode-changes callers in sysfs and driver code are missing fbcon-related\nsteps.\n\nWith the new helper, ps3fb and sh_mobile_lcdcfb no longer maintain\nfbcon state themselves."
    }
  ],
  "id": "CVE-2026-80786",
  "lastModified": "2026-09-07T15:17:32.617",
  "metrics": {},
  "published": "2026-09-04T16:18:04.580",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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