CVE-2022-50222

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Source
https://cve.org/CVERecord?id=CVE-2022-50222
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50222.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-50222
Downstream
Related
Published
2025-06-18T11:03:56Z
Modified
2026-08-12T03:51:29Z
Summary
tty: vt: initialize unicode screen buffer
Details

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; }

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50222.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
d8ae7242718738ee1bf9bfdd632d2a4b150fdd26
Fixed
e02fa87e572bb7d90dcdbce9c0f519f1eb992e96
Fixed
cc9e874dace0c89ae535230c7da19b764746811e
Fixed
5c6c65681f39bf71bc72ed589dec3b8b20e75cac
Fixed
446f123aa6021e5f75a20789f05ff3f7ae51a42f
Fixed
777a462e1ae50a01fc4a871efa8e34d596a1e17d
Fixed
e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def
Fixed
af77c56aa35325daa2bc2bed5c2ebf169be61b86

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50222.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.19.0
Fixed
4.19.256
Type
ECOSYSTEM
Events
Introduced
4.20.0
Fixed
5.4.211
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.137
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.61
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
5.18.18
Type
ECOSYSTEM
Events
Introduced
5.19.0
Fixed
5.19.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50222.json"