What kind of exploit is it (it doesn't say)? Is it possible that further sandboxing levels would isolate the affected instance from other customers pending addi

What kind of exploit is it (it doesn't say)? Is it possible that further sandboxing levels would isolate the affected instance from other customers pending additional exploits (processes, VMs, etc)? This isn't really my area so apologies if what I'm saying is way off base :P