CVE-2022-50222

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; } ----------

• linux linux kernel (>= 4.19 < 4.19.256) • linux linux kernel (>= 4.20 < 5.4.211) • linux linux kernel (>= 5.5 < 5.10.137) • linux linux kernel (>= 5.11 < 5.15.61) • linux linux kernel (>= 5.16 < 5.18.18) • linux linux kernel (>= 5.19 < 5.19.2)