mediumLogic errorEVM-Solidity
Optimism: `MIPS` - Incorrect implementation of SRAV instruction
- Payout
- $0
- Protocol
- Optimism
- Disclosed
- Aug 16, 2024
- Source
- code4rena
Optimism's MIPS instruction emulation implemented the SRAV (arithmetic shift right variable) opcode incorrectly: it shifts the rt register by the entire rs value rather than masking rs to its low-order five bits as the MIPS ISA specifies. Because quantities ab …
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References
- https://github.com/code-423n4/2024-07-optimism-findings/issues/41
- https://github.com/code-423n4/2024-07-optimism-findings
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