Linux Kernel Information Leak Vulnerability in IIO ADC TI-ADS8688

A vulnerability in the Linux kernel's IIO ADC TI-ADS8688 driver allows for an information leak through the triggered buffer. The issue arises because the local 'buffer' array, which transmits data to user space, does not initialize values for inactive channels. It only uses active channels to assign new values, leading to the potential exposure of uninitialized data. This vulnerability has been addressed by modifying the driver to zero-initialize the buffer array before use, ensuring that no uninitialized information is sent to userspace.

Impact

The vulnerability could result in an information leak, exposing uninitialized data from the kernel to user space, which could be exploited by an application or user with the appropriate privileges.