CVE-2026-63965

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{"bugzilla": {"description": "kernel: iio: pressure: bmp280: fix stack leak in bmp580 trigger handler", "id": "2502401", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502401"}, "csaw": false, "cwe": "CWE-908", "details": ["In the Linux kernel, the following vulnerability has been resolved:\niio: pressure: bmp280: fix stack leak in bmp580 trigger handler\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.\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.\nFix this all by just zero-initializing the structure on the stack.", "A flaw was found in the Linux kernel's bmp280 pressure sensor driver. The bmp580_trigger_handler() function fails to initialize a stack-allocated buffer, which can lead to two bytes of uninitialized stack memory being exposed to userspace. This information disclosure vulnerability could allow a local attacker to obtain sensitive information from the kernel stack."], "name": "CVE-2026-63965", "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63965\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63965\nhttps://lore.kernel.org/linux-cve-announce/2026071958-CVE-2026-63965-3603@gregkh/T"]}

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