Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. When using the built-in `extract32(b, start)`, if the `start` index provided has for side effect to update `b`, the byte array to extract `32` bytes from, it could be that some dirty memory is read and returned by `extract32`. This vulnerability is fixed in 0.4.0.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| vyper(PyPI) | 0 | 0.4.0 | N/A |
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