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While that is nice I'm not quite understanding how this is a security issue? Can code reuse attacks exploit it?

Here's an example

http://mainisusuallyafunction.blogspot.com/2012/11/attacking...

> Actually, file descriptions. The description is the kernel state pertaining to an open file. The descriptor is a small integer referring to a file description. When we send an FD into a UNIX socket, the descriptor number received on the other end might be different, but it will refer to the same description.↩

Oh man, that perfectly explains a formerly-unanswered question I had about how that mechanism worked. Thanks for linking.

Yes, look at ROP gadgets, for example.

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