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FKIE_CVE-2026-80772

Vulnerability from fkie_nvd - Published: 2026-09-04 16:18 - Updated: 2026-09-04 16:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler() joycon_ctlr_read_handler() casts an incoming HID input report to struct joycon_input_report and parses it, guarding the cast only with a 12-byte length check: if (size >= 12) /* make sure it contains the input report */ joycon_parse_report(ctlr, (struct joycon_input_report *)data); struct joycon_input_report is 49 bytes: a 13-byte header followed by a union whose IMU arm is 36 bytes. For an IMU report joycon_parse_report() -> joycon_parse_imu_report() walks that union (struct offsets 13..48), so a report of exactly 12 bytes with data[0] == JC_INPUT_IMU_DATA passes the guard yet is read up to 37 bytes past its declared length. The over-read bytes are decoded into accelerometer/gyroscope values and forwarded to userspace through the "(IMU)" input device, leaking driver-internal memory. data[0] and size are fully controlled by a malicious or spoofed Joy-Con/Pro Controller. Receive buffers are sized to the maximum report length, so this is an over-read within the allocation rather than a slab OOB, but the decoded bytes still reach userspace. The sibling subcmd path in joycon_ctlr_handle_event() already bounds the same cast correctly: if (size < sizeof(struct joycon_input_report) || data[0] != JC_INPUT_SUBCMD_REPLY) break; Use the same sizeof(struct joycon_input_report) bound here.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27b376b945c0aac46fcdfcc950b14a85b874b557
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/33ea29f8b6141f2d265de807e110a6435b355cb0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34725ed4719da424113db8449fb5485aaf71a913
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/51cfd1adbe7a46bb08af162abb3ab3b6820e2d15
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/addca61f9a23c0d20a387c2040e70479f54518e1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd397c4123a4bc084913d8c7fdb40ef94e9f8172
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d4cabd4089adb59cf7974915737c52cc47a9bb1b
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-nintendo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "33ea29f8b6141f2d265de807e110a6435b355cb0",
              "status": "affected",
              "version": "2af16c1f846bd60240745bbd3afa13d5f040c61a",
              "versionType": "git"
            },
            {
              "lessThan": "bd397c4123a4bc084913d8c7fdb40ef94e9f8172",
              "status": "affected",
              "version": "2af16c1f846bd60240745bbd3afa13d5f040c61a",
              "versionType": "git"
            },
            {
              "lessThan": "addca61f9a23c0d20a387c2040e70479f54518e1",
              "status": "affected",
              "version": "2af16c1f846bd60240745bbd3afa13d5f040c61a",
              "versionType": "git"
            },
            {
              "lessThan": "51cfd1adbe7a46bb08af162abb3ab3b6820e2d15",
              "status": "affected",
              "version": "2af16c1f846bd60240745bbd3afa13d5f040c61a",
              "versionType": "git"
            },
            {
              "lessThan": "d4cabd4089adb59cf7974915737c52cc47a9bb1b",
              "status": "affected",
              "version": "2af16c1f846bd60240745bbd3afa13d5f040c61a",
              "versionType": "git"
            },
            {
              "lessThan": "34725ed4719da424113db8449fb5485aaf71a913",
              "status": "affected",
              "version": "2af16c1f846bd60240745bbd3afa13d5f040c61a",
              "versionType": "git"
            },
            {
              "lessThan": "27b376b945c0aac46fcdfcc950b14a85b874b557",
              "status": "affected",
              "version": "2af16c1f846bd60240745bbd3afa13d5f040c61a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-nintendo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "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\nHID: nintendo: fix out-of-bounds read in joycon_ctlr_read_handler()\n\njoycon_ctlr_read_handler() casts an incoming HID input report to\nstruct joycon_input_report and parses it, guarding the cast only with a\n12-byte length check:\n\n\tif (size \u003e= 12) /* make sure it contains the input report */\n\t\tjoycon_parse_report(ctlr, (struct joycon_input_report *)data);\n\nstruct joycon_input_report is 49 bytes: a 13-byte header followed by a\nunion whose IMU arm is 36 bytes. For an IMU report joycon_parse_report()\n-\u003e joycon_parse_imu_report() walks that union (struct offsets 13..48),\nso a report of exactly 12 bytes with data[0] == JC_INPUT_IMU_DATA passes\nthe guard yet is read up to 37 bytes past its declared length. The\nover-read bytes are decoded into accelerometer/gyroscope values and\nforwarded to userspace through the \"(IMU)\" input device, leaking\ndriver-internal memory. data[0] and size are fully controlled by a\nmalicious or spoofed Joy-Con/Pro Controller.\n\nReceive buffers are sized to the maximum report length, so this is an\nover-read within the allocation rather than a slab OOB, but the decoded\nbytes still reach userspace.\n\nThe sibling subcmd path in joycon_ctlr_handle_event() already bounds the\nsame cast correctly:\n\n\tif (size \u003c sizeof(struct joycon_input_report) ||\n\t    data[0] != JC_INPUT_SUBCMD_REPLY)\n\t\tbreak;\n\nUse the same sizeof(struct joycon_input_report) bound here."
    }
  ],
  "id": "CVE-2026-80772",
  "lastModified": "2026-09-04T16:18:02.743",
  "metrics": {},
  "published": "2026-09-04T16:18:02.743",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/27b376b945c0aac46fcdfcc950b14a85b874b557"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/33ea29f8b6141f2d265de807e110a6435b355cb0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/34725ed4719da424113db8449fb5485aaf71a913"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/51cfd1adbe7a46bb08af162abb3ab3b6820e2d15"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/addca61f9a23c0d20a387c2040e70479f54518e1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd397c4123a4bc084913d8c7fdb40ef94e9f8172"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d4cabd4089adb59cf7974915737c52cc47a9bb1b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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