CVE-2022-50453

MEDIUM EPSS 4.5%
Published Oct 1, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: gpiolib: cdev: fix NULL-pointer dereferences There are several places where we can crash the kernel by requesting lines, unbinding the GPIO device, then calling any of the system calls relevant to the GPIO character device's annonymous file descriptors: ioctl(), read(), poll(). While I observed it with the GPIO simulator, it will also happen for any of the GPIO devices that can be hot-unplugged - for instance any HID GPIO expander (e.g. CP2112). This affects both v1 and v2 uAPI. This fixes it partially by checking if gdev->chip is not NULL but it doesn't entirely remedy the situation as we still have a race condition in which another thread can remove the device after the check.

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
4.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥4.8  –  <5.10.163
linuxlinux_kernel*≥5.11  –  <5.15.86
linuxlinux_kernel*≥5.16  –  <6.0.16
linuxlinux_kernel*≥6.1  –  <6.1.2

References 5

  • git.kernel.org https://git.kernel.org/stable/c/533aae7c94dbc2b14301cfd68ae7e0e90f0c8438
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d79546622baab843172b52c3af035f83c1b21df
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7c755a2d6df511eeb5afba966ac28140f9ea5063
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d66f68ac9e7ba46b6b90fbe25155723f2126088a
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/533aae7c94dbc2b14301cfd68ae7e0e90f0c8438
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d79546622baab843172b52c3af035f83c1b21df
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7c755a2d6df511eeb5afba966ac28140f9ea5063
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d66f68ac9e7ba46b6b90fbe25155723f2126088a
    Patch