CVE-2022-49948 - CVE House
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Status published High CVE-2022-49948

vt: Clear selection before changing the font

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: vt: Clear selection before changing the font When changing the console font with ioctl(KDFONTOP) the new font size can be bigger than the previous font. A previous selection may thus now be outside of the new screen size and thus trigger out-of-bounds accesses to graphics memory if the selection is removed in vc_do_resize(). Prevent such out-of-memory accesses by dropping the selection before the various con_font_set() console handlers are called.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
009e39ae44f4191188aeb6dfbf661b771dbbe515, e60f8fcce05042e8f8cea25ee81fecc1222114cf, 5812a9bc9d68a82c2cc839f88e6f7a05093ab39d, 863ad19fd654c485e3beec3575c4d74a1e74369e, dbc3fd44f957a39407e889287bf61fa0ef3ecc14, 0b2a0a58ad22f9d6dfc641bc5ec46057493f22a5, 9f2d48f0745f921040df91bfe8fa7f0339cd7497, 3425e397fb23cc2e8e6fb8f5b8226dcb447e84dd, eeae0a12a16650ff494d5faefa371cd9e7079575, 3.2.85, 3.10.105, 3.12.68, 3.16.40, 3.18.45, 4.1.36, 4.4.31, 4.8.7, 4.9, 0, 4.9.328, 4.14.293, 4.19.258, 5.4.213, 5.10.142, 5.15.66, 5.19.8, 6.0

Timeline

Official Publish: June 18th, 2025
Last Modified: May 23rd, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.