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Faulty instructions in #Alibaba's T-Head #C910 #RISC-V CPUs blow away all #security


source: https://www.theregister.com/2024/08/07/riscv_business_thead_c910_vulnerable/

When you use these flawed instructions, you will be touching physical #memory directly, bypassing the #MMU and its memory protection mechanisms that ordinarily prevent apps from interfering with each other and the underlying #OS and #hardware.


#cpu #fail #news #problem #exploit #ram

in reply to anonymiss

Eh. This is an amateur hour mistake. Unprivileged opcodes don't get to bypass memory management. If you want efficiency write a large monolithic application that runs in one of the privileged modes and make damn sure there aren't any bugs.