CVE-2026-63965 (GCVE-0-2026-63965)
Vulnerability from cvelistv5
Published
2026-07-19 14:55
Modified
2026-07-19 14:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: pressure: bmp280: fix stack leak in bmp580 trigger handler bmp580_trigger_handler() declares its scan buffer on the stack without an initializer and then memcpy()s 3 bytes of 24-bit sensor data into each 4-byte __le32 field. The high byte of comp_temp and comp_press is left uninitialized, and the channel storagebits is 32, so two bytes of stack are pushed to userspace per scan. This is a regression from when the buffer lived in the private data, the move to a stack-local struct dropped the implicit zeroing. bme280_trigger_handler() was fixed up to handle this bug, but this driver was not fixed because there was no padding hole, but rather a short-fill issue. Fix this all by just zero-initializing the structure on the stack.
References
Impacted products
Vendor Product Version
Linux Linux Version: 872c8014e05ed47b8a7c0f5ba4311279a637150b
Version: 872c8014e05ed47b8a7c0f5ba4311279a637150b
Version: 872c8014e05ed47b8a7c0f5ba4311279a637150b
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/pressure/bmp280-core.c"
          ],
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          "vendor": "Linux",
          "versions": [
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
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              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
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              "version": "7.0.12",
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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          "nodes": [
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                  "versionEndExcluding": "6.18.35",
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                  "vulnerable": true
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                  "versionEndExcluding": "7.0.12",
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: pressure: bmp280: fix stack leak in bmp580 trigger handler\n\nbmp580_trigger_handler() declares its scan buffer on the stack without\nan initializer and then memcpy()s 3 bytes of 24-bit sensor data into\neach 4-byte __le32 field.  The high byte of comp_temp and comp_press is\nleft uninitialized, and the channel storagebits is 32, so two bytes of\nstack are pushed to userspace per scan.\n\nThis is a regression from when the buffer lived in the private data, the\nmove to a stack-local struct dropped the implicit zeroing.\nbme280_trigger_handler() was fixed up to handle this bug, but this\ndriver was not fixed because there was no padding hole, but rather a\nshort-fill issue.\n\nFix this all by just zero-initializing the structure on the stack."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:55:53.809Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a58400f58f82f3d8de9c067aa7cda690228c1ecc"
        },
        {
          "url": "https://git.kernel.org/stable/c/58dfb6fe9dc80270cf7cc014837af4cbf928e3aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/387c86b582e0782ab332e7bfcd4e6e3f93922961"
        }
      ],
      "title": "iio: pressure: bmp280: fix stack leak in bmp580 trigger handler",
      "x_generator": {
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  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-63965",
    "datePublished": "2026-07-19T14:55:53.809Z",
    "dateReserved": "2026-07-19T07:54:57.024Z",
    "dateUpdated": "2026-07-19T14:55:53.809Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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