A security expert says VIA C3 x86-based CPUs contain a “hidden God mode”” that lets an attacker elevate the execution level of malicious code from kernel ring 3 (user mode) to kernel ring 0 (OS kernel) The Rosenbridge backdoor mechanism is a RISC (Reduced Instruction Set Computer) co-processor that sits alongside the main C3 processor. On social media sites
Source: as it’s been first referenced in official VIA documentation since September 2004.”