Description (CNA)
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 >=.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 50a77c658b80e7e3303e3bcec195b30e2b62d513 before 862a1a32b5190241fce7a7d20229539a3926f31e; affected 50a77c658b80e7e3303e3bcec195b30e2b62d513 before 5c3681c3abc35cfac6b702251382312c60d96bc2; affected 50a77c658b80e7e3303e3bcec195b30e2b62d513 before 1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39; affected 50a77c658b80e7e3303e3bcec195b30e2b62d513 before e9b62996ba537774f68fecfd7eecb5aec1713952; affected 50a77c658b80e7e3303e3bcec195b30e2b62d513 before ae92e334544263a02d9f99e18385e718c44392c9; affected 50a77c658b80e7e3303e3bcec195b30e2b62d513 before 7f95f4792c0dc767fcb8e405391e779ab419d55a; affected 50a77c658b80e7e3303e3bcec195b30e2b62d513 before 6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f; affected 50a77c658b80e7e3303e3bcec195b30e2b62d513 before baa0210fb6a9dc3882509a9411b6d284d88fe30e |
| Linux / Linux | affected 3.17; unaffected 0 before 3.17; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.93 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/862a1a32b5190241fce7a7d20229539a3926f31e
- https://git.kernel.org/stable/c/5c3681c3abc35cfac6b702251382312c60d96bc2
- https://git.kernel.org/stable/c/1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39
- https://git.kernel.org/stable/c/e9b62996ba537774f68fecfd7eecb5aec1713952
- https://git.kernel.org/stable/c/ae92e334544263a02d9f99e18385e718c44392c9
- https://git.kernel.org/stable/c/7f95f4792c0dc767fcb8e405391e779ab419d55a
- https://git.kernel.org/stable/c/6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f
- https://git.kernel.org/stable/c/baa0210fb6a9dc3882509a9411b6d284d88fe30e