Vulnerability-Lookup

GHSA-7WFC-WFH5-RXRH

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

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-63965"
  ],
  "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: 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.",
  "id": "GHSA-7wfc-wfh5-rxrh",
  "modified": "2026-07-19T18:31:47Z",
  "published": "2026-07-19T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63965"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/387c86b582e0782ab332e7bfcd4e6e3f93922961"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58dfb6fe9dc80270cf7cc014837af4cbf928e3aa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a58400f58f82f3d8de9c067aa7cda690228c1ecc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-63965 (GCVE-0-2026-63965)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55

Title

iio: pressure: bmp280: fix stack leak in bmp580 trigger handler

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.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/a58400f58f82f3d8d…
https://git.kernel.org/stable/c/58dfb6fe9dc80270c…
https://git.kernel.org/stable/c/387c86b582e0782ab…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 872c8014e05ed47b8a7c0f5ba4311279a637150b , < a58400f58f82f3d8de9c067aa7cda690228c1ecc (git) Affected: 872c8014e05ed47b8a7c0f5ba4311279a637150b , < 58dfb6fe9dc80270cf7cc014837af4cbf928e3aa (git) Affected: 872c8014e05ed47b8a7c0f5ba4311279a637150b , < 387c86b582e0782ab332e7bfcd4e6e3f93922961 (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/pressure/bmp280-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a58400f58f82f3d8de9c067aa7cda690228c1ecc",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "58dfb6fe9dc80270cf7cc014837af4cbf928e3aa",
              "status": "affected",
              "version": "872c8014e05ed47b8a7c0f5ba4311279a637150b",
              "versionType": "git"
            },
            {
              "lessThan": "387c86b582e0782ab332e7bfcd4e6e3f93922961",
              "status": "affected",
              "version": "872c8014e05ed47b8a7c0f5ba4311279a637150b",
              "versionType": "git"
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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                }
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      ],
      "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."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-07-19T14:55:53.809Z",
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        {
          "url": "https://git.kernel.org/stable/c/387c86b582e0782ab332e7bfcd4e6e3f93922961"
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    "datePublished": "2026-07-19T14:55:53.809Z",
    "dateReserved": "2026-07-19T07:54:57.024Z",
    "dateUpdated": "2026-07-19T14:55:53.809Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-7WFC-WFH5-RXRH

CVE-2026-63965 (GCVE-0-2026-63965)

Tags

Sightings

Nomenclature