"I do not have an xbox one and cannot verify that the exploit indeed works. With that being said, there’s enough hints pointing to this being real so if you have an XBox running on the affected firmware, feel free to give it a try and comment."
I've no doubt this exploit is legit but it would be nice for reporters to actually verify these issues themselves before posting online.
The above basically reads to me I'M TOO LAZY TO CHECK MYSELF
I don't know much at all about the Xbox One architecture (and what I do is from public information obviously), but it seems safe to assume that this exploit would only land in the "Application" portion of the system. As I understand there are two (three?) hypervisor-level isolated portions of the system... particularly for cases like this in order to prevent a compromised application from being able to enable piracy of the "GameOS" portion.