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

Vulnerability from cvelistv5 – Published: 2026-09-04 15:12 – Updated: 2026-10-15 10:09
VLAI
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 CNA under the mitre root
CNA scorecard D 53/100 over 6992 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ed7e9715849abd0816b8487b0d12ebd05d6e938b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 07f7e46833f71472e30da54a50dacdf48521bdd3 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6f611e5e5f3327cf2e2daabe6ee5acac58cc784e (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (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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              "versionType": "git"
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          ]
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          "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",
              "version": "2.6.12"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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                  "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": "2026-10-15T10:09:48.240Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "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"
      }
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  },
  "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": "2026-10-15T10:09:48.240Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-10-20",
      "epss": "0.00206",
      "percentile": "0.10078"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-24T02:23:30.000Z",
      "cve": "CVE-2026-80786",
      "id": "msrc_CVE-2026-80786",
      "initial_release_date": "2026-09-23T02:29:24.000Z",
      "product_status:under_investigation": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "fbdev: Wrap user-invoked calls to fb_set_var() in helper",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-80786.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "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"
                ],
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                "vendor": "Linux",
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                    "versionType": "git"
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              },
              {
                "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"
                  },
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                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.57",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.1.*",
                    "status": "unaffected",
                    "version": "7.1.11",
                    "versionType": "semver"
                  },
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                    "status": "unaffected",
                    "version": "7.2",
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                  }
                ]
              }
            ],
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          }
        ],
        "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": "2026-10-15T11:17:52.307",
        "metrics": {},
        "published": "2026-09-04T16:18:04.580",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/07f7e46833f71472e30da54a50dacdf48521bdd3"
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
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    "redhat_vex": {
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      "current_release_date": "2026-10-20T17:55:18+00:00",
      "cve": "CVE-2026-80786",
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      "product_status:known_affected": "235",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fbdev: Wrap user-invoked calls to fb_set_var() in helper",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80786.json",
      "version": "3"
    }
  }
}



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