era-compiler-solidity at a glance
- Last 12 months
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- Critical · all time
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- Exploited · all time
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- Public exploit · all time
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| Nov 2026 | 0 | 0 |
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| Dec 2024 | 0 | 0 |
Most common weaknesses
3 results · Feed
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Medium 5.9
`fold (xor (shl 1, x), -1) -> (rotl ~1, x)` misoptimization in zksolc
zksolc is a Solidity compiler for ZKsync. All LLVM versions since 2015 fold `(xor (shl 1, x), -1)` to `(rotl ~1, x)` if run with optimizations enabled. Here `~1` is generated as an unsigned 64 bits number (`2^64-1`). This number is zero-extended to 256 bits o…
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Medium 5.3
ZKsync Era evaluation order of Yul function arguments
ZKsync Era is a layer 2 rollup that uses zero-knowledge proofs to scale Ethereum. Prior to version 1.3.10, there is a very specific pattern `f(a(),b()); check_if_a_executed_last()` in Yul that exposes a bug in evaluation order of Yul function arguments. This …
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Medium 5.9
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 p…