The issue concerns an information leak in the Linux kernel's iio:dummy buffer. Specifically, the `data` array is allocated via `kmalloc()` and used to push data to user space from a triggered buffer. However, it does not set values for inactive channels, as it only uses `iio for each active channel()` to assign new values. This can lead to sending uninitialized information to user space. To avoid this, `kzalloc` should be used for memory allocation.