CVE-2022-50222

MEDIUM EPSS 8.8%
Published Jun 18, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jun 18, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
8.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥4.19  –  <4.19.256
linuxlinux_kernel*≥4.20  –  <5.4.211
linuxlinux_kernel*≥5.5  –  <5.10.137
linuxlinux_kernel*≥5.11  –  <5.15.61
linuxlinux_kernel*≥5.16  –  <5.18.18
linuxlinux_kernel*≥5.19  –  <5.19.2

References 7

  • git.kernel.org https://git.kernel.org/stable/c/446f123aa6021e5f75a20789f05ff3f7ae51a42f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5c6c65681f39bf71bc72ed589dec3b8b20e75cac
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/777a462e1ae50a01fc4a871efa8e34d596a1e17d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af77c56aa35325daa2bc2bed5c2ebf169be61b86
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cc9e874dace0c89ae535230c7da19b764746811e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e02fa87e572bb7d90dcdbce9c0f519f1eb992e96
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/446f123aa6021e5f75a20789f05ff3f7ae51a42f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5c6c65681f39bf71bc72ed589dec3b8b20e75cac
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/777a462e1ae50a01fc4a871efa8e34d596a1e17d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af77c56aa35325daa2bc2bed5c2ebf169be61b86
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cc9e874dace0c89ae535230c7da19b764746811e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e02fa87e572bb7d90dcdbce9c0f519f1eb992e96
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e0ef23e9b0ad18b9fd3741b0f1ad2282e4a18def
    Patch