Nintendo Switch / Nvidia Fusee Gelee Disclosure

This report documents Fusee Gelee, a coldboot vulnerability that allows full, unauthenticated arbitrary code execution from an early bootROM context via Tegra Recovery Mode (RCM) on NVIDIA's Tegra line of embedded processors. As this vulnerability allows arbitrary code execution on the Boot and Power Management Processor (BPMP) before any lock-outs take effect, this vulnerability compromises the entire root-of-trust for each processor, and allows exfiltration of secrets e.g. burned into device fuses.