CVE-2026-63908 (GCVE-0-2026-63908)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
Title
Input: atmel_mxt_ts - fix boundary check in mxt_prepare_cfg_mem
Summary
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 >=.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 862a1a32b5190241fce7a7d20229539a3926f31e (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 5c3681c3abc35cfac6b702251382312c60d96bc2 (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39 (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < e9b62996ba537774f68fecfd7eecb5aec1713952 (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < ae92e334544263a02d9f99e18385e718c44392c9 (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 7f95f4792c0dc767fcb8e405391e779ab419d55a (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < 6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f (git)
Affected: 50a77c658b80e7e3303e3bcec195b30e2b62d513 , < baa0210fb6a9dc3882509a9411b6d284d88fe30e (git)
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Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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          "value": "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=."
        }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
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    "redhat_vex": {
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      "current_release_date": "2026-08-07T13:50:05+00:00",
      "cve": "CVE-2026-63908",
      "id": "CVE-2026-63908",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_not_affected": "275",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Input: atmel_mxt_ts - fix boundary check in mxt_prepare_cfg_mem",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63908.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-09-18T00:46:39Z",
      "cve": "CVE-2026-63908",
      "id": "CVE-2026-63908",
      "initial_release_date": "2026-07-21T13:03:48Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "578",
      "product_status:known_not_affected": "172",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-63908",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63908.json",
      "version": "9"
    }
  }
}



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