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In the Linux kernel, the following vulnerability has been resolved: iio: gyro: itg3200: fix i2c read into the wrong stack location… (CVE-2026-63934)

0
Medium
Published: 07/20/2026 (07/20/2026, 00:00:00 UTC)
Source: GCVE Database
Product: linux

Description

In the Linux kernel, the following vulnerability has been resolved: iio: gyro: itg3200: fix i2c read into the wrong stack location itg3200_read_all_channels() takes `__be16 *buf' as a parameter and fills the i2c_msg destination as `(char *)&buf'. Since `buf' is the parameter (a pointer), `&buf' is the address of the local pointer slot on the stack of itg3200_read_all_channels(), not the address of the caller's scan buffer. The (char *) cast hides the type mismatch. i2c_transfer() therefore writes ITG3200_SCAN_ELEMENTS * sizeof(s16) = 8 bytes into the parameter's stack slot, which is discarded when the function returns. The caller's scan buffer in itg3200_trigger_handler() is never written to, so iio_push_to_buffers_with_timestamp() pushes uninitialised stack contents to userspace via /dev/iio:deviceX every scan -- both a functional bug (no actual gyroscope or temperature data is delivered through the triggered buffer) and an information leak. The non-buffered read_raw() path is unaffected: it goes through itg3200_read_reg_s16() which uses `&out' on a local s16 value, where that is correct. Drop the spurious `&' so the i2c read writes into the caller's buffer.

Affected software

Affected versions
<7.0.0-28.28~24.04.1<7.0.0-1016.16~24.04.1<7.0.0-28.28.1~24.04.3<7.0.0-28.28<7.0.0-1009.9

Technical Details

Gcve Source
db.gcve.eu
Osv Id
GHSA-xvpq-5jw7-83gf
Osv Schema Version
1.4.0
Aliases
["CVE-2026-63934"]
Ecosystems
[]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a5d27ab2a4a8d598912ef0a

Added to database: 07/19/2026, 19:38:19 UTC

Last enriched: 07/19/2026, 20:06:42 UTC

Last updated: 09/01/2026, 22:52:13 UTC

Views: 49

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