Inherent risk: A risk for users that comes from a behavior inherent to the smart contract design.
Inherent risks only represent the risks inherent to the smart contract design, which are a subset of all the possible risks. No inherent risk doesn’t mean no risk. It only means that no risk inherent to the smart contract design has been identified. Other kind of risks could still be present. For example, the issues not fixed incur risks for the users, or the smart contracts deployed as upgradeable also incur risks for the users.