Vulnerability CVE-2023-52627
Published: 2024-03-26

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

iio: adc: ad7091r: Allow users to configure device events

AD7091R-5 devices are supported by the ad7091r-5 driver together with
the ad7091r-base driver. Those drivers declared iio events for notifying
user space when ADC readings fall bellow the thresholds of low limit
registers or above the values set in high limit registers.
However, to configure iio events and their thresholds, a set of callback
functions must be implemented and those were not present until now.
The consequence of trying to configure ad7091r-5 events without the
proper callback functions was a null pointer dereference in the kernel
because the pointers to the callback functions were not set.

Implement event configuration callbacks allowing users to read/write
event thresholds and enable/disable event generation.

Since the event spec structs are generic to AD7091R devices, also move
those from the ad7091r-5 driver the base driver so they can be reused
when support for ad7091r-2/-4/-8 be added.

 References:
https://git.kernel.org/stable/c/1eba6f7ffa295a0eec098c107043074be7cc4ec5
https://git.kernel.org/stable/c/49f322ce1f265935f15e5512da69a399f27a5091
https://git.kernel.org/stable/c/137568aa540a9f587c48ff7d4c51cdba08cfe9a4
https://git.kernel.org/stable/c/89c4e63324e208a23098f7fb15c00487cecbfed2
https://git.kernel.org/stable/c/55aca2ce91a63740278502066beaddbd841af9c6
https://git.kernel.org/stable/c/020e71c7ffc25dfe29ed9be6c2d39af7bd7f661f
Copyright 2026, cxsecurity.com

 

Back to Top