CVE-2026-72481

In the Linux kernel, the following vulnerability has been resolved:

iio: magnetometer: ak8975: fix potential kernel stack memory leak

Currently in the AK8975 driver there are four instances where potential

uninitialized kernel stack memory leaks can occur. If

i2c_smbus_read_i2c_block_data_or_emulated() returns a value less than

the size of the buffer, uninitialized bytes are retained in the buffer

and later the buffer is passed on to IIO buffers, potentially leaking

memory to userspace.

Fix this by adding checks whether the return value of the function is

equal to the size of the buffer and subsequently if the value is

lesser than zero to distinguish from a returned error code.