Vulnerability-Lookup

GHSA-R6H8-MFH3-GH59

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-22 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

vt: add permission check for KDSKBMETA ioctl

KDSKBMETA modifies keyboard meta mode but lacks the !perm check that all other keyboard setter ioctls in vt_k_ioctl() enforce, allowing a process to change meta mode on a non-controlling console without authorization.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-74676"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:41Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvt: add permission check for KDSKBMETA ioctl\n\nKDSKBMETA modifies keyboard meta mode but lacks the !perm check that all\nother keyboard setter ioctls in vt_k_ioctl() enforce, allowing a process\nto change meta mode on a non-controlling console without authorization.",
  "id": "GHSA-r6h8-mfh3-gh59",
  "modified": "2026-08-22T18:30:29Z",
  "published": "2026-08-22T18:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74676"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c5b67a1e2cb7d78dab321280f330b056e3bf437"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4671c3b79e337bbae28c2d79023dc642df012bde"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7bf32337a7103ccb686cbd240324bf26225ef2d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f8cbaf4b774694dcc292e60509762483ebfd9ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1c31e026c93e378e297a8df8328983d3013a59f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7ad0034453ba4c353f9b8f810ee2569de33d283"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d8ead5083b203d12b8319e7cb29cc6b8836e813f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ddc4a8303347114e945b9e6e81b81d77855f7358"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-74676 (GCVE-0-2026-74676)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:32 – Updated: 2026-08-25 05:23

Title

vt: add permission check for KDSKBMETA ioctl

Summary

In the Linux kernel, the following vulnerability has been resolved: vt: add permission check for KDSKBMETA ioctl KDSKBMETA modifies keyboard meta mode but lacks the !perm check that all other keyboard setter ioctls in vt_k_ioctl() enforce, allowing a process to change meta mode on a non-controlling console without authorization.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/9f8cbaf4b774694dc…
https://git.kernel.org/stable/c/ddc4a8303347114e9…
https://git.kernel.org/stable/c/1c5b67a1e2cb7d78d…
https://git.kernel.org/stable/c/d8ead5083b203d12b…
https://git.kernel.org/stable/c/4671c3b79e337bbae…
https://git.kernel.org/stable/c/a1c31e026c93e378e…
https://git.kernel.org/stable/c/7bf32337a7103ccb6…
https://git.kernel.org/stable/c/a7ad0034453ba4c35…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9f8cbaf4b774694dcc292e60509762483ebfd9ae (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ddc4a8303347114e945b9e6e81b81d77855f7358 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1c5b67a1e2cb7d78dab321280f330b056e3bf437 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d8ead5083b203d12b8319e7cb29cc6b8836e813f (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4671c3b79e337bbae28c2d79023dc642df012bde (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a1c31e026c93e378e297a8df8328983d3013a59f (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7bf32337a7103ccb686cbd240324bf26225ef2d6 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a7ad0034453ba4c353f9b8f810ee2569de33d283 (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.152 , ≤ 6.6.* (semver) Unaffected: 6.12.104 , ≤ 6.12.* (semver) Unaffected: 6.18.45 , ≤ 6.18.* (semver) Unaffected: 7.1.9 , ≤ 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/tty/vt/vt_ioctl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9f8cbaf4b774694dcc292e60509762483ebfd9ae",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "ddc4a8303347114e945b9e6e81b81d77855f7358",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "1c5b67a1e2cb7d78dab321280f330b056e3bf437",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "d8ead5083b203d12b8319e7cb29cc6b8836e813f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "4671c3b79e337bbae28c2d79023dc642df012bde",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "a1c31e026c93e378e297a8df8328983d3013a59f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "7bf32337a7103ccb686cbd240324bf26225ef2d6",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "a7ad0034453ba4c353f9b8f810ee2569de33d283",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/vt/vt_ioctl.c"
          ],
          "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": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "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": "5.10.265",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.152",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.104",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.45",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.9",
                  "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\nvt: add permission check for KDSKBMETA ioctl\n\nKDSKBMETA modifies keyboard meta mode but lacks the !perm check that all\nother keyboard setter ioctls in vt_k_ioctl() enforce, allowing a process\nto change meta mode on a non-controlling console without authorization."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-25T05:23:18.083Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9f8cbaf4b774694dcc292e60509762483ebfd9ae"
        },
        {
          "url": "https://git.kernel.org/stable/c/ddc4a8303347114e945b9e6e81b81d77855f7358"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c5b67a1e2cb7d78dab321280f330b056e3bf437"
        },
        {
          "url": "https://git.kernel.org/stable/c/d8ead5083b203d12b8319e7cb29cc6b8836e813f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4671c3b79e337bbae28c2d79023dc642df012bde"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1c31e026c93e378e297a8df8328983d3013a59f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7bf32337a7103ccb686cbd240324bf26225ef2d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/a7ad0034453ba4c353f9b8f810ee2569de33d283"
        }
      ],
      "title": "vt: add permission check for KDSKBMETA ioctl",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74676",
    "datePublished": "2026-08-22T15:32:45.256Z",
    "dateReserved": "2026-08-15T05:44:03.925Z",
    "dateUpdated": "2026-08-25T05:23:18.083Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-R6H8-MFH3-GH59

CVE-2026-74676 (GCVE-0-2026-74676)

Tags

Sightings

Nomenclature