CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of configuration files in the atmel_mxt_ts driver, where improper boundary checks can lead to overwriting adjacent memory due to incorrect processing of extra bytes. This flaw poses a risk of memory corruption, potentially allowing an attacker to exploit the overwritten memory to execute arbitrary code or cause system instability. Organizations using affected Linux kernel versions, particularly those relying on the atmel_mxt_ts driver, should prioritize applying the relevant updates to mitigate this risk.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: Input: atmel_mxt_ts - fix boundary check in mxt_prepare_cfg_mem When a configuration file provides an object size that is larger than the driver's known mxt_obj_size(object), the driver intends to discard the extra bytes. The loop iterates using for (i = 0; i < size; i++). Inside the loop, the condition to skip processing extra bytes is: if (i > mxt_obj_size(object)) continue; Since i is a 0-based index, the valid indices for the object are 0 through mxt_obj_size(object) - 1. When i == mxt_obj_size(object), the condition evaluates to false, and the code processes the byte instead of discarding it. This causes the code to calculate byte_offset = reg + i - cfg->start_ofs and writes the byte there, overwriting exactly one byte of the adjacent instance or object. Update the boundary check to skip extra bytes correctly by using >=.