CVE-2026-46191

HIGH

fbcon: Avoid OOB font access if console rotation fails

Title source: cna
STIX 2.1

Description

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

Scores

CVSS v3 7.1
EPSS 0.0013
EPSS Percentile 3.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Details

CWE
CWE-125
Status published
Products (27)
linux/Kernel 2.6.15 - 5.10.259linux
linux/Kernel 5.11.0 - 5.15.210linux
linux/Kernel 5.16.0 - 6.1.176linux
linux/Kernel 6.13.0 - 6.18.32linux
linux/Kernel 6.19.0 - 7.0.7linux
linux/Kernel 6.2.0 - 6.6.140linux
linux/Kernel 6.7.0 - 6.12.90linux
Linux/Linux < 2.6.15
Linux/Linux 2.6.15
Linux/Linux 5.10.259 - 5.10.*
... and 17 more
Published May 28, 2026
Tracked Since May 28, 2026