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CVE-2022-49948

7.8 · HIGH

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 bigge…

Published Jun 18, 2025CWE-125EPSS 0.27%

Overview

CVE-2022-49948 is a high-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285Refgit.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4dbRefgit.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977fRefgit.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bbRefgit.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4aRefgit.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefcRefgit.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708eRefgit.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49948?

CVE-2022-49948 is a high-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49948?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-49948?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-49948?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49948 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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