GoKawiilResearchers use laser fault injection to bypass RP2350 secure debug lock
Security researchers demonstrated that Raspberry Pi's RP2350 microcontroller (revision A4) can have its permanently disabled Secure debug re-enabled through photon-emission microscopy combined with SWD-guided laser fault injection. By pinpointing the exact register controlling debug enablement and firing precisely targeted laser pulses, the team flipped two bits to restore debugger access to the chip's Secure world, later extracting a protected secret from one-time-programmable memory after a rescue reset bypassed the runtime lock.