CVE-2024-34704

era-compiler-solidity is the ZKsync compiler for Solidity. The problem occurred during instruction selection in the DAGCombine phase while visiting the XOR operation. The issue arises when attempting to fold the expression !x cc y into x !cc y. To perform this transformation, the second operand o...

CVE-2024-34704 era-compiler-solidity contains a `xor(zext(cmp), -1)` misoptimization

era-compiler-solidity is the ZKsync compiler for Solidity. The problem occurred during instruction selection in the DAGCombine phase while visiting the XOR operation. The issue arises when attempting to fold the expression !x cc y into x !cc y. To perform this transformation, the second operand o...

CVE-2024-34704 era-compiler-solidity contains a `xor(zext(cmp), -1)` misoptimization

era-compiler-solidity is the ZKsync compiler for Solidity. The problem occurred during instruction selection in the DAGCombine phase while visiting the XOR operation. The issue arises when attempting to fold the expression !x cc y into x !cc y. To perform this transformation, the second operand o...

CVE-2024-34704

Summary: CVE-2024-34704 affects era-compiler-solidity (ZKsync Solidity compiler). On instruction selection in the DAGCombine phase, folding the expression !(x cc y) into (x cc y) incorrectly assumed the second XOR operand representing the true value was -1, whereas the true value is 1. This misop...