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CVE-2026-63908

Estado: Pendiente de análisisSin puntuar—

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:

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.

Leer descripción completaMostrar menos

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 >=.

Detalles técnicos trazas, registros y código del informe original
    if (i > mxt_obj_size(object))
        continue;

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-63908",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "50a77c658b80e7e3303e3bcec195b30e2b62d513",
              "lessThan": "862a1a32b5190241fce7a7d20229539a3926f31e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "50a77c658b80e7e3303e3bcec195b30e2b62d513",
              "lessThan": "5c3681c3abc35cfac6b702251382312c60d96bc2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "50a77c658b80e7e3303e3bcec195b30e2b62d513",
              "lessThan": "1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "50a77c658b80e7e3303e3bcec195b30e2b62d513",
              "lessThan": "e9b62996ba537774f68fecfd7eecb5aec1713952",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "50a77c658b80e7e3303e3bcec195b30e2b62d513",
              "lessThan": "ae92e334544263a02d9f99e18385e718c44392c9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "50a77c658b80e7e3303e3bcec195b30e2b62d513",
              "lessThan": "7f95f4792c0dc767fcb8e405391e779ab419d55a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "50a77c658b80e7e3303e3bcec195b30e2b62d513",
              "lessThan": "6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f",
              "versionType": "git"
            },
            {
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              "version": "50a77c658b80e7e3303e3bcec195b30e2b62d513",
              "lessThan": "baa0210fb6a9dc3882509a9411b6d284d88fe30e",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/input/touchscreen/atmel_mxt_ts.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "3.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/input/touchscreen/atmel_mxt_ts.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-19T16:17:08.620",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1017e1c6c6c49cccbcda9bbcfa49e50b0b6dad39",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5c3681c3abc35cfac6b702251382312c60d96bc2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6c6b989b4ebf22b086fdfcac2163b5cb55e34d8f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7f95f4792c0dc767fcb8e405391e779ab419d55a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/862a1a32b5190241fce7a7d20229539a3926f31e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ae92e334544263a02d9f99e18385e718c44392c9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/baa0210fb6a9dc3882509a9411b6d284d88fe30e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e9b62996ba537774f68fecfd7eecb5aec1713952",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "descriptions": [
    {
      "lang": "en",
      "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's known mxt_obj_size(object), the driver intends to discard the\nextra bytes.\n\nThe loop iterates using for (i = 0; i < size; i++). Inside the loop, the\ncondition to skip processing extra bytes is:\n\n    if (i > 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->start_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 >=."
    }
  ],
  "lastModified": "2026-07-27T17:44:23.777",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}