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;
}
----------
References
Configurations
Configuration 1 (hide)
|
History
19 Nov 2025, 12:58
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/446f123aa6021e5f75a20789f05ff3f7ae51a42f - Patch | |
| References | () https://git.kernel.org/stable/c/5c6c65681f39bf71bc72ed589dec3b8b20e75cac - Patch | |
| References | () https://git.kernel.org/stable/c/777a462e1ae50a01fc4a871efa8e34d596a1e17d - Patch | |
| References | () https://git.kernel.org/stable/c/af77c56aa35325daa2bc2bed5c2ebf169be61b86 - Patch | |
| References | () https://git.kernel.org/stable/c/cc9e874dace0c89ae535230c7da19b764746811e - Patch | |
| References | () https://git.kernel.org/stable/c/e02fa87e572bb7d90dcdbce9c0f519f1eb992e96 - Patch | |
| References | () https://git.kernel.org/stable/c/e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | NVD-CWE-noinfo |
Information
Published : 2025-06-18 11:15
Updated : 2025-11-19 12:58
NVD link : CVE-2022-50222
Mitre link : CVE-2022-50222
CVE.ORG link : CVE-2022-50222
JSON object : View
Products Affected
linux
- linux_kernel
CWE