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CVE-2026-63943

Estado: Pendiente de análisisSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

Input: xpad - fix out-of-bounds access for Share button

xpadone_process_packet() receives len directly from urb->actual_length and uses it to index the share-button byte at data[len - 18] or data[len - 26]. Since both len and data[0] are under the device's control, a broken controller can send a GIP_CMD_INPUT packet with actual_length < 18 (e.g. 5 bytes) and reach this code path, causing accesses beyond the actual array.

Fix this by calculating the offset and checking bounds against the packet length.

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)

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{
  "id": "CVE-2026-63943",
  "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": "cbc82e7db16d59c301457312a624a7de2c03cd4a",
              "lessThan": "bcfb4833cd4078a1a356ef451838b75cd233099e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "302a0cd0bbc450998429a3f4267970a4b93251a8",
              "lessThan": "37ec54abfdd63a63fd50734a9c4e4cbc1e5795af",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ef46367073b107ec22f46fe5f12176e87c238e8",
              "lessThan": "9749db57233b396353ad5dee81eec9d9880c9246",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ef46367073b107ec22f46fe5f12176e87c238e8",
              "lessThan": "6346b0895b574ce45f3747b9c508c72f70e6abef",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4ef46367073b107ec22f46fe5f12176e87c238e8",
              "lessThan": "6cdc46b38cf146ce81d4831b6472dbf7731849a2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a7e3ddd1d9a3d0b26465ed01d464e3c05479ebc8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.6.91",
              "lessThan": "6.6.143",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.12.29",
              "lessThan": "6.12.93",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.14.7",
              "lessThan": "6.15",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "drivers/input/joystick/xpad.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.15",
              "versionType": "semver"
            },
            {
              "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/joystick/xpad.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-19T16:17:12.880",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/37ec54abfdd63a63fd50734a9c4e4cbc1e5795af",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6346b0895b574ce45f3747b9c508c72f70e6abef",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6cdc46b38cf146ce81d4831b6472dbf7731849a2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9749db57233b396353ad5dee81eec9d9880c9246",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bcfb4833cd4078a1a356ef451838b75cd233099e",
      "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: xpad - fix out-of-bounds access for Share button\n\nxpadone_process_packet() receives len directly from urb->actual_length\nand uses it to index the share-button byte at data[len - 18] or\ndata[len - 26]. Since both len and data[0] are under the device's\ncontrol, a broken controller can send a GIP_CMD_INPUT packet with\nactual_length < 18 (e.g. 5 bytes) and reach this code path, causing\naccesses beyond the actual array.\n\nFix this by calculating the offset and checking bounds against the\npacket length."
    }
  ],
  "lastModified": "2026-07-27T17:44:23.777",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}