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CVE-2022-50222

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: tty: vt: initialize unicode screen buffer syzbot reports kernel infoleak at vcs_read() [1], for buffer can be read immediately…

Published Jun 18, 2025EPSS 0.23%

Overview

CVE-2022-50222 is a medium-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

tty: vt: initialize unicode screen buffer

syzbot reports kernel infoleak at vcs_read() [1], for buffer can be read

immediately after resize operation. Initialize buffer using kzalloc().

----------

#include <fcntl.h>

#include <unistd.h>

#include <sys/ioctl.h>

#include <linux/fb.h>

int main(int argc, char *argv[])

{

struct fb_var_screeninfo var = { };

const int fb_fd = open("/dev/fb0", 3);

ioctl(fb_fd, FBIOGET_VSCREENINFO, &var);

var.yres = 0x21;

ioctl(fb_fd, FBIOPUT_VSCREENINFO, &var);

return read(open("/dev/vcsu", O_RDONLY), &var, sizeof(var)) == -1;

}

----------

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/446f123aa6021e5f75a20789f05ff3f7ae51a42fRefgit.kernel.org/stable/c/5c6c65681f39bf71bc72ed589dec3b8b20e75cacRefgit.kernel.org/stable/c/777a462e1ae50a01fc4a871efa8e34d596a1e17dRefgit.kernel.org/stable/c/af77c56aa35325daa2bc2bed5c2ebf169be61b86Refgit.kernel.org/stable/c/cc9e874dace0c89ae535230c7da19b764746811eRefgit.kernel.org/stable/c/e02fa87e572bb7d90dcdbce9c0f519f1eb992e96Refgit.kernel.org/stable/c/e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def

How CyberStrike helps

Frequently asked questions

What is CVE-2022-50222?

CVE-2022-50222 is a medium-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-50222?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-50222?

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-2022-50222?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-50222 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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