---
id: CVE-2026-46191
title: |-
  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()
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 implem…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'
cwe:
  - CWE-125
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 2.6.15, < 6.6.140'
  - 'linux_kernel >= 6.7, < 6.12.90'
  - 'linux_kernel >= 6.13, < 6.18.32'
  - 'linux_kernel >= 6.19, < 7.0.7'
patched:
  - linux_kernel 7.0.7
published: '2026-05-28'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:49.467'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46191'
references:
  - url: 'https://git.kernel.org/stable/c/46cf3646dea54baeaa2eafe3fb1ba769947f31b0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/524a6079395916fb3d790ef2bb46a1d2939b27dd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b51c343a81e6e806525a4435e22532c107dd7e9d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00131
epssPercentile: 0.02404
ingestedAt: '2026-10-15T03:30:12.895Z'
---

## Overview

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

## Affected

- `linux_kernel >= 2.6.15, < 6.6.140`
- `linux_kernel >= 6.7, < 6.12.90`
- `linux_kernel >= 6.13, < 6.18.32`
- `linux_kernel >= 6.19, < 7.0.7`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.7`