FKIE_CVE-2026-63943

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-07-19 16:17
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/37ec54abfdd63a63fd50734a9c4e4cbc1e5795af
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6346b0895b574ce45f3747b9c508c72f70e6abef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6cdc46b38cf146ce81d4831b6472dbf7731849a2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9749db57233b396353ad5dee81eec9d9880c9246
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bcfb4833cd4078a1a356ef451838b75cd233099e
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/joystick/xpad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bcfb4833cd4078a1a356ef451838b75cd233099e",
              "status": "affected",
              "version": "cbc82e7db16d59c301457312a624a7de2c03cd4a",
              "versionType": "git"
            },
            {
              "lessThan": "37ec54abfdd63a63fd50734a9c4e4cbc1e5795af",
              "status": "affected",
              "version": "302a0cd0bbc450998429a3f4267970a4b93251a8",
              "versionType": "git"
            },
            {
              "lessThan": "9749db57233b396353ad5dee81eec9d9880c9246",
              "status": "affected",
              "version": "4ef46367073b107ec22f46fe5f12176e87c238e8",
              "versionType": "git"
            },
            {
              "lessThan": "6346b0895b574ce45f3747b9c508c72f70e6abef",
              "status": "affected",
              "version": "4ef46367073b107ec22f46fe5f12176e87c238e8",
              "versionType": "git"
            },
            {
              "lessThan": "6cdc46b38cf146ce81d4831b6472dbf7731849a2",
              "status": "affected",
              "version": "4ef46367073b107ec22f46fe5f12176e87c238e8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a7e3ddd1d9a3d0b26465ed01d464e3c05479ebc8",
              "versionType": "git"
            },
            {
              "lessThan": "6.6.143",
              "status": "affected",
              "version": "6.6.91",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.93",
              "status": "affected",
              "version": "6.12.29",
              "versionType": "semver"
            },
            {
              "lessThan": "6.15",
              "status": "affected",
              "version": "6.14.7",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/joystick/xpad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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-\u003eactual_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\u0027s\ncontrol, a broken controller can send a GIP_CMD_INPUT packet with\nactual_length \u003c 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."
    }
  ],
  "id": "CVE-2026-63943",
  "lastModified": "2026-07-19T16:17:12.880",
  "metrics": {},
  "published": "2026-07-19T16:17:12.880",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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