CVE-2026-63908

Technical 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 >=.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References