CVE-2022-49948

kernel: vt: Clear selection before changing the font

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Severity

Moderate

Red Hat Product Security

3.3

CVSS 3.1

Review impact separately from score.

Published · June 18, 2025

Updated · August 19, 2026

Description

A flaw was found in the Linux kernel. A local user could trigger an out-of-bounds memory access by changing the console font. This occurs when a new font size is larger than the previous one, causing a prior selection to extend beyond the screen's boundaries. This vulnerability could lead to a denial of service or information disclosure.

Statement

Red Hat has stack protection mechanisms in place, such as FORTIFY_SOURCE, Position Independent Executables or Stack Smashing Protection.

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 · 3.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-805 · Buffer Access with Incorrect Length Value