GHSA-VGHM-PRGP-X82V

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-19 18:31
VLAI
Details

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

iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer

The tagged FIFO path declares iio_buff on the stack with __aligned(8) but no initializer, but there is a hole in the structure, which will then leak to userspace as ST_LSM6DSX_SAMPLE_SIZE bytes (6) will be copied, but the space between that and the timestamp are not initialized.

Commit c14edb4d0bdc ("iio:imu:st_lsm6dsx Fix alignment and data leak issues") moved the untagged FIFO path to a kzalloc'd buffer in hw->scan, but for the tagged path it only added the alignment qualifier and not the initializer :(

Fix this by just zero-initializing the structure on the stack.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63967"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:15Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer\n\nThe tagged FIFO path declares iio_buff on the stack with __aligned(8)\nbut no initializer, but there is a hole in the structure, which will\nthen leak to userspace as ST_LSM6DSX_SAMPLE_SIZE bytes (6) will be\ncopied, but the space between that and the timestamp are not\ninitialized.\n\nCommit c14edb4d0bdc (\"iio:imu:st_lsm6dsx Fix alignment and data leak\nissues\") moved the untagged FIFO path to a kzalloc\u0027d buffer in hw-\u003escan,\nbut for the tagged path it only added the alignment qualifier and not\nthe initializer :(\n\nFix this by just zero-initializing the structure on the stack.",
  "id": "GHSA-vghm-prgp-x82v",
  "modified": "2026-07-19T18:31:47Z",
  "published": "2026-07-19T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63967"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3147b303b8c7d9f91da4b849ece33b45048f5eaf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/890d0312d5f94be43eac21f5a34d3bccc60d051b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/babf1943a40bb5669db57d30ca16c22504b18e07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9d8e9adaa63150ef7e833480b799d0bab83a276"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d42ac0bfb6a16617c62a59d53706579c7fadbfa6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6bb3a49c5f9de870ea95e69775df785728e3366"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe1a7f99e72ebd2880515332b79b8c256be22aca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff8d3c088b77b11782f2c3b97e37425be050e8de"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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