CVE-2026-63965 (GCVE-0-2026-63965)
Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
EPSS
VEX
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
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
872c8014e05ed47b8a7c0f5ba4311279a637150b , < a58400f58f82f3d8de9c067aa7cda690228c1ecc
(git)
Affected: 872c8014e05ed47b8a7c0f5ba4311279a637150b , < 58dfb6fe9dc80270cf7cc014837af4cbf928e3aa (git) Affected: 872c8014e05ed47b8a7c0f5ba4311279a637150b , < 387c86b582e0782ab332e7bfcd4e6e3f93922961 (git) |
guessed | |
| 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) |
guessed |
{
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}
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],
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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."
}
],
"providerMetadata": {
"dateUpdated": "2026-07-19T14:55:53.809Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"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",
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"cveId": "CVE-2026-63965",
"datePublished": "2026-07-19T14:55:53.809Z",
"dateReserved": "2026-07-19T07:54:57.024Z",
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"state": "PUBLISHED"
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"date": "2026-10-22",
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"percentile": "0.10146"
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],
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"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."
}
],
"id": "CVE-2026-63965",
"lastModified": "2026-07-30T14:51:11.223",
"metrics": {},
"published": "2026-07-19T16:17:15.500",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/387c86b582e0782ab332e7bfcd4e6e3f93922961"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/a58400f58f82f3d8de9c067aa7cda690228c1ecc"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
},
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-08-07T13:50:22+00:00",
"cve": "CVE-2026-63965",
"id": "CVE-2026-63965",
"initial_release_date": "2026-07-19T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: iio: pressure: bmp280: fix stack leak in bmp580 trigger handler",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63965.json",
"version": "3"
}
}
}
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