CVE-2026-63934
Low risk· EPSS 11%Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
In the Linux kernel driver for the ITG3200 gyroscope, a bug in itg3200_read_all_channels() passes the address of a local pointer instead of the caller's buffer to i2c_transfer(). This causes sensor data to be written to the stack and lost, while uninitialized stack contents are pushed to userspace via /dev/iio:deviceX.
Risk Assessment
The organization faces a kernel memory disclosure vulnerability through /dev/iio:deviceX, potentially leaking sensitive data. Additionally, gyroscope and temperature data are not correctly delivered via the triggered buffer, disrupting applications relying on buffered reads.
Recommendation
Immediately update the Linux kernel to a version containing the fix that removes the spurious & in the itg3200_read_all_channels() call. If an update is not possible, temporarily disable buffered reads for ITG3200 devices.
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Original NVD description (English source)
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.