GHSA-G59Q-3PWP-9GCX
Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-19 18:31In 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": [],
"aliases": [
"CVE-2026-63908"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-19T16:17:08Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: atmel_mxt_ts - fix boundary check in mxt_prepare_cfg_mem\n\nWhen a configuration file provides an object size that is larger than the\ndriver\u0027s known mxt_obj_size(object), the driver intends to discard the\nextra bytes.\n\nThe loop iterates using for (i = 0; i \u003c size; i++). Inside the loop, the\ncondition to skip processing extra bytes is:\n\n if (i \u003e mxt_obj_size(object))\n continue;\n\nSince i is a 0-based index, the valid indices for the object are 0 through\nmxt_obj_size(object) - 1.\n\nWhen i == mxt_obj_size(object), the condition evaluates to false, and the\ncode processes the byte instead of discarding it.\n\nThis causes the code to calculate byte_offset = reg + i - cfg-\u003estart_ofs\nand writes the byte there, overwriting exactly one byte of the adjacent\ninstance or object.\n\nUpdate the boundary check to skip extra bytes correctly by using \u003e=.",
"id": "GHSA-g59q-3pwp-9gcx",
"modified": "2026-07-19T18:31:45Z",
"published": "2026-07-19T18:31:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63908"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5c3681c3abc35cfac6b702251382312c60d96bc2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7f95f4792c0dc767fcb8e405391e779ab419d55a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/862a1a32b5190241fce7a7d20229539a3926f31e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ae92e334544263a02d9f99e18385e718c44392c9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/baa0210fb6a9dc3882509a9411b6d284d88fe30e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e9b62996ba537774f68fecfd7eecb5aec1713952"
}
],
"schema_version": "1.4.0",
"severity": []
}
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