Scientists find security risk in RISC-V open-source chip architecture

Re:Scientists find security risk in RISC-V open-source chip ... by snvzz on Thursday June 06, 2024 @03:27AM (#40594528)

dupe: https://news.ycombinator.com/item?id=40591280

This is a bug in a student-built microarchitecture, not an issue with the ISA.

Not a great article, as it attacks RISC-V for no good reason.

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Re:Scientists find security risk in RISC-V open-source chip ... by longerd2 on Thursday June 06, 2024 @03:54AM (#40594733)

They had a pun, they wanted to use it.

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Re:Scientists find security risk in RISC-V open-source chip ... by Taniwha on Thursday June 06, 2024 @03:37AM (#40594606)

Yeah looks like bugs in riscv-boom rather than the RISC-V ISA itself

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Re:Scientists find security risk in RISC-V open-source chip ... by Taniwha on Thursday June 06, 2024 @03:43AM (#40594657)

In particular this is a timing attack like Spectre/Meltdown - looks like there are timing issues with allocation of write port slots when writing to the register file - because division takes so long it's possible to use a late write from division to tell whether a particular speculative branch has been taken or not

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