CVE-2023-3161
kernel: fbcon: shift-out-of-bounds in fbcon_set_font()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 25, 2023
Updated · June 28, 2026
Description
A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing a font->width and font->height greater than 32 to the fbcon_set_font, since there are no checks in place, a shift-out-of-bounds occurs, leading to undefined behavior and possible denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-1335 · Incorrect Bitwise Shift of Integer