Researchers attack AMD's Infinity Fabric to bypass hardware security protections with 'Fabricked' — flaw lets malicious cloud hosts silently read confidential VM memory and forge attestation reports
… Because platform configurations vary across hardware, parts of the Infinity Fabric must be configured during each boot sequence by the motherboard firmware — the UEFI. In AMD's own threat model, that firmware is explicitly untrusted, since cloud providers control it. …