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

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
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
Vendor Product Version CPE status
Linux Linux Affected: 872c8014e05ed47b8a7c0f5ba4311279a637150b , < a58400f58f82f3d8de9c067aa7cda690228c1ecc (git)
Affected: 872c8014e05ed47b8a7c0f5ba4311279a637150b , < 58dfb6fe9dc80270cf7cc014837af4cbf928e3aa (git)
Affected: 872c8014e05ed47b8a7c0f5ba4311279a637150b , < 387c86b582e0782ab332e7bfcd4e6e3f93922961 (git)
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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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{
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          "programFiles": [
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          "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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        "dateUpdated": "2026-07-19T14:55:53.809Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/387c86b582e0782ab332e7bfcd4e6e3f93922961"
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    "dateReserved": "2026-07-19T07:54:57.024Z",
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    "state": "PUBLISHED"
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            "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",
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      "id": "CVE-2026-63965",
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63965.json",
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    }
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.