Vulnerability-Lookup

GHSA-8J9W-R5CF-PRPV

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-05-28 12:30

Details

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

fbcon: Avoid OOB font access if console rotation fails

Clear the font buffer if the reallocation during console rotation fails in fbcon_rotate_font(). The putcs implementations for the rotated buffer will return early in this case. See [1] for an example.

Currently, fbcon_rotate_font() keeps the old buffer, which is too small for the rotated font. Printing to the rotated console with a high-enough character code will overflow the font buffer.

v2: - fix typos in commit message

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46191"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:34Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbcon: Avoid OOB font access if console rotation fails\n\nClear the font buffer if the reallocation during console rotation fails\nin fbcon_rotate_font(). The putcs implementations for the rotated buffer\nwill return early in this case. See [1] for an example.\n\nCurrently, fbcon_rotate_font() keeps the old buffer, which is too small\nfor the rotated font. Printing to the rotated console with a high-enough\ncharacter code will overflow the font buffer.\n\nv2:\n- fix typos in commit message",
  "id": "GHSA-8j9w-r5cf-prpv",
  "modified": "2026-05-28T12:30:32Z",
  "published": "2026-05-28T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46191"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46191 (GCVE-0-2026-46191)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-05-28 09:36

Title

fbcon: Avoid OOB font access if console rotation fails

Summary

In the Linux kernel, the following vulnerability has been resolved: fbcon: Avoid OOB font access if console rotation fails Clear the font buffer if the reallocation during console rotation fails in fbcon_rotate_font(). The putcs implementations for the rotated buffer will return early in this case. See [1] for an example. Currently, fbcon_rotate_font() keeps the old buffer, which is too small for the rotated font. Printing to the rotated console with a high-enough character code will overflow the font buffer. v2: - fix typos in commit message

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/594973a2e54924d8b…
https://git.kernel.org/stable/c/ab6c34b9829d5de03…
https://git.kernel.org/stable/c/7105d9f1387d63b15…
https://git.kernel.org/stable/c/b44cc78ff46b96e72…
https://git.kernel.org/stable/c/e4ef723d8975a2694…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < 594973a2e54924d8ba31c9faac669fc1ba6fcb80 (git) Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < ab6c34b9829d5de03f1d08a47a2253729a6e7e27 (git) Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < 7105d9f1387d63b15c9a860674fc92c959181f2f (git) Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < b44cc78ff46b96e72d333a3be6aaaa0a14797263 (git) Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < e4ef723d8975a2694cc90733a6b888a5e2841842 (git)
Linux	Linux	Affected: 2.6.15 Unaffected: 0 , < 2.6.15 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.90 , ≤ 6.12.* (semver) Unaffected: 6.18.32 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/video/fbdev/core/fbcon_rotate.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "594973a2e54924d8ba31c9faac669fc1ba6fcb80",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "ab6c34b9829d5de03f1d08a47a2253729a6e7e27",
              "status": "affected",
              "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
              "versionType": "git"
            },
            {
              "lessThan": "7105d9f1387d63b15c9a860674fc92c959181f2f",
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              "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
              "versionType": "git"
            },
            {
              "lessThan": "b44cc78ff46b96e72d333a3be6aaaa0a14797263",
              "status": "affected",
              "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
              "versionType": "git"
            },
            {
              "lessThan": "e4ef723d8975a2694cc90733a6b888a5e2841842",
              "status": "affected",
              "version": "6cc50e1c5b57180fd37a31282000f43859b0fe73",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/video/fbdev/core/fbcon_rotate.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.15"
            },
            {
              "lessThan": "2.6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.90",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.32",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "2.6.15",
                  "vulnerable": true
                },
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                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbcon: Avoid OOB font access if console rotation fails\n\nClear the font buffer if the reallocation during console rotation fails\nin fbcon_rotate_font(). The putcs implementations for the rotated buffer\nwill return early in this case. See [1] for an example.\n\nCurrently, fbcon_rotate_font() keeps the old buffer, which is too small\nfor the rotated font. Printing to the rotated console with a high-enough\ncharacter code will overflow the font buffer.\n\nv2:\n- fix typos in commit message"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:36:44.961Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80"
        },
        {
          "url": "https://git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27"
        },
        {
          "url": "https://git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f"
        },
        {
          "url": "https://git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842"
        }
      ],
      "title": "fbcon: Avoid OOB font access if console rotation fails",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46191",
    "datePublished": "2026-05-28T09:36:44.961Z",
    "dateReserved": "2026-05-13T15:03:33.104Z",
    "dateUpdated": "2026-05-28T09:36:44.961Z",
    "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.

Action not permitted

GHSA-8J9W-R5CF-PRPV

CVE-2026-46191 (GCVE-0-2026-46191)

Tags

Sightings

Nomenclature