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GHSA-P7RM-GJ7V-32RV

Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80786"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-04T16:18:04Z",
    "severity": null
  },
  "details": "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": "GHSA-p7rm-gj7v-32rv",
  "modified": "2026-09-04T18:31:26Z",
  "published": "2026-09-04T18:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80786"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-09-07 14:21

Title

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

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.

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

2 references

URL	Tags
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 , < 07f7e46833f71472e30da54a50dacdf48521bdd3 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6f611e5e5f3327cf2e2daabe6ee5acac58cc784e (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 7.1.11 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "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": [
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "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"
          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "2.6.12"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "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,
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      "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": "2026-09-07T14:21:11.656Z",
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        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3"
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          "url": "https://git.kernel.org/stable/c/6f611e5e5f3327cf2e2daabe6ee5acac58cc784e"
        }
      ],
      "title": "fbdev: Wrap user-invoked calls to fb_set_var() in helper",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80786",
    "datePublished": "2026-09-04T15:12:57.927Z",
    "dateReserved": "2026-08-26T14:34:25.793Z",
    "dateUpdated": "2026-09-07T14:21:11.656Z",
    "state": "PUBLISHED"
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  "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.

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.
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GHSA-P7RM-GJ7V-32RV

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

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