CVE-2022-50453

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 v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2025-10-01 12:15

Updated : 2026-01-16 19:23

NVD link : CVE-2022-50453

Mitre link : CVE-2022-50453

CVE.ORG link : CVE-2022-50453

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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