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CVE-2026-63967

Full vulnerability record from the local CVENow database.

Description

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.

Severity
HIGH
CVSS score
7.8 (v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-07-19 16:17:15.700000
Last modified
2026-10-30 17:25:05.780000
View original CVE JSON 
{
  "id": "CVE-2026-63967",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-07-19T16:17:15.700",
  "lastModified": "2026-10-30T17:25:05.780",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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'd buffer in hw->scan,\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."
    }
  ],
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        "source": "[email protected]",
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          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
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        "exploitabilityScore": 1.8,
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  "weaknesses": [
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      "source": "[email protected]",
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      "description": [
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          "lang": "en",
          "value": "CWE-787"
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