Vulnerability CVE-2024-36898
Published: 2024-05-30

Description:
In the Linux kernel, the following vulnerability has been resolved:

gpiolib: cdev: fix uninitialised kfifo

If a line is requested with debounce, and that results in debouncing
in software, and the line is subsequently reconfigured to enable edge
detection then the allocation of the kfifo to contain edge events is
overlooked. This results in events being written to and read from an
uninitialised kfifo. Read events are returned to userspace.

Initialise the kfifo in the case where the software debounce is
already active.

 References:
https://git.kernel.org/stable/c/1a51e24404d77bb3307c1e39eee0d8e86febb1a5
https://git.kernel.org/stable/c/883e4bbf06eb5fb7482679e4edb201093e9f55a2
https://git.kernel.org/stable/c/bd7139a70ee8d8ea872b223e043730cf6f5e2b0e
https://git.kernel.org/stable/c/ee0166b637a5e376118e9659e5b4148080f1d27e
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