CVE-2026-63908
Published: July 22, 2026Last modified: July 22, 2026
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 >=.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.177-r0) |
| 25 LTS | linux-lts | Fixed (6.12.95-r0) | |
| Stream | linux-lts | Fixed (6.18.35-r1) |
References
- https://git.kernel.org/stable/c/1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39
- https://git.kernel.org/stable/c/5c3681c3abc35cfac6b702251382312c60d96bc2
- https://git.kernel.org/stable/c/6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f
- https://git.kernel.org/stable/c/7f95f4792c0dc767fcb8e405391e779ab419d55a
- https://git.kernel.org/stable/c/862a1a32b5190241fce7a7d20229539a3926f31e
- https://git.kernel.org/stable/c/ae92e334544263a02d9f99e18385e718c44392c9
- https://git.kernel.org/stable/c/baa0210fb6a9dc3882509a9411b6d284d88fe30e
- https://git.kernel.org/stable/c/e9b62996ba537774f68fecfd7eecb5aec1713952