{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-63934",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-63934"
  ],
  "published": "2026-07-19T14:56:29Z",
  "summary": "iio: gyro: itg3200: fix i2c read into the wrong stack location",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: gyro: itg3200: fix i2c read into the wrong stack location\n\nitg3200_read_all_channels() takes `__be16 *buf' as a parameter and\nfills the i2c_msg destination as `(char *)&buf'. Since `buf' is the\nparameter (a pointer), `&buf' is the address of the local pointer\nslot on the stack of itg3200_read_all_channels(), not the address\nof the caller's scan buffer. The (char *) cast hides the type\nmismatch.\n\ni2c_transfer() therefore writes ITG3200_SCAN_ELEMENTS * sizeof(s16)\n= 8 bytes into the parameter's stack slot, which is discarded when\nthe function returns. The caller's scan buffer in\nitg3200_trigger_handler() is never written to, so\niio_push_to_buffers_with_timestamp() pushes uninitialised stack\ncontents to userspace via /dev/iio:deviceX every scan -- both a\nfunctional bug (no actual gyroscope or temperature data is\ndelivered through the triggered buffer) and an information leak.\n\nThe non-buffered read_raw() path is unaffected: it goes through\nitg3200_read_reg_s16() which uses `&out' on a local s16 value,\nwhere that is correct.\n\nDrop the spurious `&' so the i2c read writes into the caller's\nbuffer.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.176",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-63934"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/90e809376b0f0d1ddec2eec954aecdd2a5b40b0e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8654b5e2617819ff4f7c78071dfd0275e971a9b6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b64dd5f3b38911054cbcc570df617e3e8e75e562"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/31bbd4b87dd6701fa10e03ba7f6268e49e178d16"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/63203bd072b613c18c237b906b1c9d2dc4527337"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cfc3283859cfdeacadf80d5e6880bdf871ffeaa6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-07-19T14:56:29Z"
  }
}