https://lwn.net/Articles/790553/ I was actually going to point to another article on the subject, but as it revealed the exact modus operandi for the (local) exploit (which is trivial to an extreme) I thought better of it. -- “Decisions are never really made – at best they manage to emerge, from a chaos of peeves, whims, hallucinations and all around assholery.” – Thomas Pynchon