CVE-2022-50453
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-01

Last updated on: 2025-10-02

Assigner: kernel.org

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.
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Meta Information
Published
2025-10-01
Last Modified
2025-10-02
Generated
2026-05-07
AI Q&A
2025-10-01
EPSS Evaluated
2026-05-05
NVD
CVE-2022-50453
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
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CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability in the Linux kernel's gpiolib character device driver allows a NULL-pointer dereference that can crash the kernel. It occurs when lines are requested, the GPIO device is unbound, and then system calls like ioctl(), read(), or poll() are called on the GPIO character device's anonymous file descriptors. This issue affects devices that can be hot-unplugged, such as HID GPIO expanders, and involves a race condition where a device can be removed after a NULL check, leading to potential kernel crashes.


How can this vulnerability impact me? :

This vulnerability can cause the Linux kernel to crash (kernel panic) when interacting with GPIO devices that are hot-unplugged. This can lead to system instability, denial of service, and potential disruption of services relying on the affected GPIO devices.


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