“Whether a proof of concept or not, Bootkitty marks an interesting move forward in the UEFI threat landscape, breaking the belief about modern UEFI bootkits being Windows-exclusive threats,” ESET researchers wrote. “Even though the current version from VirusTotal does not, at the moment, represent a real threat to the majority of Linux systems, it emphasizes the necessity of being prepared for potential future threats.”
If you’re looking at Intel, you might be thinking IME/vPro
IPMI (such as iDRAC on Dell) runs off-processor on a different section of the motherboard typically and is installed on AMD servers as well.
Off topic but IPMI is such a handy feature. I’ve got an old x99 board with it, and man being able to remotely power cycle a frozen machine is missed. Even being able to change UEFI settings without having to drag out a monitor and keyboard.