CVE-2022-29255

Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions prior to 0.3.4 when a calling an external contract with no return value, the contract address including side effects could be evaluated twice. This may result in incorrect outcomes for contracts. This issue...

concat built-in can corrupt memory in vyper

Summary concat built-in can write over the bounds of the memory buffer that was allocated for it and thus overwrite existing valid data. The root cause is that the buildIR for concat doesn't properly adhere to the API of copy functions for =0.3.2 the copybytes function. A contract search was...