FKIE_CVE-2026-63967

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-07-19 16:17
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3147b303b8c7d9f91da4b849ece33b45048f5eaf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/890d0312d5f94be43eac21f5a34d3bccc60d051b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/babf1943a40bb5669db57d30ca16c22504b18e07
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c9d8e9adaa63150ef7e833480b799d0bab83a276
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d42ac0bfb6a16617c62a59d53706579c7fadbfa6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e6bb3a49c5f9de870ea95e69775df785728e3366
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fe1a7f99e72ebd2880515332b79b8c256be22aca
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ff8d3c088b77b11782f2c3b97e37425be050e8de
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ff8d3c088b77b11782f2c3b97e37425be050e8de",
              "status": "affected",
              "version": "c14edb4d0bdc53f969ea84c7f384472c28b1a9f8",
              "versionType": "git"
            },
            {
              "lessThan": "fe1a7f99e72ebd2880515332b79b8c256be22aca",
              "status": "affected",
              "version": "c14edb4d0bdc53f969ea84c7f384472c28b1a9f8",
              "versionType": "git"
            },
            {
              "lessThan": "babf1943a40bb5669db57d30ca16c22504b18e07",
              "status": "affected",
              "version": "c14edb4d0bdc53f969ea84c7f384472c28b1a9f8",
              "versionType": "git"
            },
            {
              "lessThan": "d42ac0bfb6a16617c62a59d53706579c7fadbfa6",
              "status": "affected",
              "version": "c14edb4d0bdc53f969ea84c7f384472c28b1a9f8",
              "versionType": "git"
            },
            {
              "lessThan": "3147b303b8c7d9f91da4b849ece33b45048f5eaf",
              "status": "affected",
              "version": "c14edb4d0bdc53f969ea84c7f384472c28b1a9f8",
              "versionType": "git"
            },
            {
              "lessThan": "e6bb3a49c5f9de870ea95e69775df785728e3366",
              "status": "affected",
              "version": "c14edb4d0bdc53f969ea84c7f384472c28b1a9f8",
              "versionType": "git"
            },
            {
              "lessThan": "890d0312d5f94be43eac21f5a34d3bccc60d051b",
              "status": "affected",
              "version": "c14edb4d0bdc53f969ea84c7f384472c28b1a9f8",
              "versionType": "git"
            },
            {
              "lessThan": "c9d8e9adaa63150ef7e833480b799d0bab83a276",
              "status": "affected",
              "version": "c14edb4d0bdc53f969ea84c7f384472c28b1a9f8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a42ca3b182ccb766666a0be1053921cba190e2de",
              "versionType": "git"
            },
            {
              "lessThan": "5.10",
              "status": "affected",
              "version": "5.9.5",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "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\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": "CVE-2026-63967",
  "lastModified": "2026-07-19T16:17:15.700",
  "metrics": {},
  "published": "2026-07-19T16:17:15.700",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3147b303b8c7d9f91da4b849ece33b45048f5eaf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/890d0312d5f94be43eac21f5a34d3bccc60d051b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/babf1943a40bb5669db57d30ca16c22504b18e07"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c9d8e9adaa63150ef7e833480b799d0bab83a276"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d42ac0bfb6a16617c62a59d53706579c7fadbfa6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e6bb3a49c5f9de870ea95e69775df785728e3366"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fe1a7f99e72ebd2880515332b79b8c256be22aca"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ff8d3c088b77b11782f2c3b97e37425be050e8de"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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