Vulnerability-Lookup

UBUNTU-CVE-2026-80786 (CVE-2026-80786)

Vulnerability from osv_ubuntu – Published: 2026-09-04 16:18 – Updated: 2026-10-19 08:02 – Source website

Details

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.

Severity

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2026-80786	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-80786	REPORT
	https://git.kernel.org/linus/6f611e5e5f3327cf2e2d…	REPORT

JSON

To clipboard

Loading 1.0 MB of JSON…

CVE-2026-80786 (GCVE-0-2026-80786)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-10-21 12:47

Title

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

Summary

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6992 records in the last 180 days details

References

5 references

URL	Tags
https://git.kernel.org/stable/c/3130e7bf43ecfe3a1…
https://git.kernel.org/stable/c/d33589eff3d40439b…
https://git.kernel.org/stable/c/ed7e9715849abd081…
https://git.kernel.org/stable/c/07f7e46833f71472e…
https://git.kernel.org/stable/c/6f611e5e5f3327cf2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3130e7bf43ecfe3a15bcf90b9698e0764a2d8d08 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d33589eff3d40439b3c83e8da0d07d20df797d50 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ed7e9715849abd0816b8487b0d12ebd05d6e938b (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 07f7e46833f71472e30da54a50dacdf48521bdd3 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6f611e5e5f3327cf2e2daabe6ee5acac58cc784e (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.114 , ≤ 6.12.* (semver) Unaffected: 6.18.57 , ≤ 6.18.* (semver) Unaffected: 7.1.11 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": "3130e7bf43ecfe3a15bcf90b9698e0764a2d8d08",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d33589eff3d40439b3c83e8da0d07d20df797d50",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "ed7e9715849abd0816b8487b0d12ebd05d6e938b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "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": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.114",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.57",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.11",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:47:06.123Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3130e7bf43ecfe3a15bcf90b9698e0764a2d8d08"
        },
        {
          "url": "https://git.kernel.org/stable/c/d33589eff3d40439b3c83e8da0d07d20df797d50"
        },
        {
          "url": "https://git.kernel.org/stable/c/ed7e9715849abd0816b8487b0d12ebd05d6e938b"
        },
        {
          "url": "https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3"
        },
        {
          "url": "https://git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e"
        }
      ],
      "title": "fbdev: Wrap user-invoked calls to fb_set_var() in helper",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80786",
    "datePublished": "2026-09-04T15:12:57.927Z",
    "dateReserved": "2026-08-26T14:34:25.793Z",
    "dateUpdated": "2026-10-21T12:47:06.123Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted