Renardbebe

**Name of the Vulnerable Software and Affected Versions** Py-EVM version 0.2.0-alpha.33 **Description** The issue allows attackers to make a `vm.execute bytecode` call that triggers computation with a stack containing values like `100, 100, 0` where a specific byte `b'x'` was expected, resulting in an execution failure due to an invalid opcode. This is related to the execution of smart contracts without paying gas, potentially allowing them to run indefinitely. **Recommendations** For Py-EVM version 0.2.0-alpha.33, as a temporary workaround, consider restricting the `vm.execute bytecode` call to prevent the execution of smart contracts with invalid opcodes until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.