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

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-06-19 11:59
VLAI
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
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < b51c343a81e6e806525a4435e22532c107dd7e9d (git)
Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < 46cf3646dea54baeaa2eafe3fb1ba769947f31b0 (git)
Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < 524a6079395916fb3d790ef2bb46a1d2939b27dd (git)
Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < 594973a2e54924d8ba31c9faac669fc1ba6fcb80 (git)
Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < ab6c34b9829d5de03f1d08a47a2253729a6e7e27 (git)
Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < 7105d9f1387d63b15c9a860674fc92c959181f2f (git)
Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < b44cc78ff46b96e72d333a3be6aaaa0a14797263 (git)
Affected: 6cc50e1c5b57180fd37a31282000f43859b0fe73 , < e4ef723d8975a2694cc90733a6b888a5e2841842 (git)
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Linux Linux Affected: 2.6.15
Unaffected: 0 , < 2.6.15 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (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 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
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      "id": "CVE-2026-46191",
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      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fbcon: Avoid OOB font access if console rotation fails",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46191.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:11:21Z",
      "cve": "CVE-2026-46191",
      "id": "CVE-2026-46191",
      "initial_release_date": "2026-05-29T01:15:28Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "649",
      "product_status:recommended": "277",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46191",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46191.json",
      "version": "16"
    }
  }
}



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