PT-2026-61282 · Linux · Linux
CVE-2026-63965
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Publicado
2026-07-19
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Atualizado
2026-07-19
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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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