CVE-2022-49948
"Vt Console Font Change Out-of-Bounds Access 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.
INFO
Published Date :
June 18, 2025, 11:15 a.m.
Last Modified :
June 18, 2025, 1:46 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the affected kernel packages.
- Reboot the system to apply the update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2022-49948.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-49948 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-49948
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2022-49948 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-49948 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 18, 2025
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285 Added Reference https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db Added Reference https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f Added Reference https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb Added Reference https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a Added Reference https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc Added Reference https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e Added Reference https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e