Tracker / CVE-2022-50222
CVE-2022-50222
Medium 5.5
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; } ----------
Affected products and versions
| linux | linux_kernel · 4.19 → 4.19.256 |
|---|---|
| linux | linux_kernel · 4.20 → 5.4.211 |
| linux | linux_kernel · 5.11 → 5.15.61 |
| linux | linux_kernel · 5.16 → 5.18.18 |
| linux | linux_kernel · 5.19 → 5.19.2 |
| linux | linux_kernel · 5.5 → 5.10.137 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.