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CVE-2022-50453 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/533aae7c94dbc2b14301cfd68ae7e0e90f0c8438 kernel.org
https://git.kernel.org/stable/c/6d79546622baab843172b52c3af035f83c1b21df kernel.org
https://git.kernel.org/stable/c/7c755a2d6df511eeb5afba966ac28140f9ea5063 kernel.org
https://git.kernel.org/stable/c/ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3 kernel.org
https://git.kernel.org/stable/c/d66f68ac9e7ba46b6b90fbe25155723f2126088a kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-50453
NVD Published Date:
10/01/2025
NVD Last Modified:
10/01/2025
Source:
kernel.org