In the Linux kernel, the following vulnerability has been resolved:
drm/gud: fix out-of-bounds write in gud_plane_atomic_check()
The plane property loop uses req->properties[num_properties + i] as write
index while simultaneously incrementing num_properties inside the loop.
At iteration i, num_properties has also incremented by i, so the write
is done at initial_num_properties + 2*i, skipping every other index and
advancing by 2 per iteration.
With just 2 connector and 32 plane properties the last write happens at
index 64, one slot past the end of the 64-slot (indices 0–63)
allocation. A USB device can trigger OOB by advertising the maximum
number of properties.
Fix by dropping the redundant + i; num_properties is already the correct
running index, as gud_connector_fill_properties() fills the preceding
slots.