{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "9dbf091da080508e9f632d307f357beb79a0766b"
            },
            {
              "fixed": "90e809376b0f0d1ddec2eec954aecdd2a5b40b0e"
            },
            {
              "fixed": "8654b5e2617819ff4f7c78071dfd0275e971a9b6"
            },
            {
              "fixed": "b64dd5f3b38911054cbcc570df617e3e8e75e562"
            },
            {
              "fixed": "31bbd4b87dd6701fa10e03ba7f6268e49e178d16"
            },
            {
              "fixed": "63203bd072b613c18c237b906b1c9d2dc4527337"
            },
            {
              "fixed": "15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1"
            },
            {
              "fixed": "cfc3283859cfdeacadf80d5e6880bdf871ffeaa6"
            },
            {
              "fixed": "6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.9.0"
            },
            {
              "fixed": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.93"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.35"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63934.json"
  },
  "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 *)\u0026buf'. Since `buf' is the\nparameter (a pointer), `\u0026buf' 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 `\u0026out' on a local s16 value,\nwhere that is correct.\n\nDrop the spurious `\u0026' so the i2c read writes into the caller's\nbuffer.",
  "id": "CVE-2026-63934",
  "modified": "2026-07-21T03:41:49.738956617Z",
  "published": "2026-07-19T14:55:32.681Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31bbd4b87dd6701fa10e03ba7f6268e49e178d16"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63203bd072b613c18c237b906b1c9d2dc4527337"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8654b5e2617819ff4f7c78071dfd0275e971a9b6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/90e809376b0f0d1ddec2eec954aecdd2a5b40b0e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b64dd5f3b38911054cbcc570df617e3e8e75e562"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cfc3283859cfdeacadf80d5e6880bdf871ffeaa6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63934.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63934"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "iio: gyro: itg3200: fix i2c read into the wrong stack location"
}