Definition ∞ A vault logic error is a flaw in a smart contract’s programmed rules for asset management. This defect represents a fundamental mistake within the operational design or programmed rules of a smart contract designated as a vault for digital assets. It leads to unintended functionality, potentially enabling unauthorized asset withdrawals, incorrect fund distributions, or permanent asset lockups. These errors do not necessarily bypass cryptographic security but exploit the contract’s flawed internal reasoning.
Context ∞ Vault logic errors are a recurring concern in DeFi security, often highlighted in news when protocols suffer losses due to subtle design flaws rather than direct exploits. Rigorous formal verification and extensive testing are increasingly employed to detect these complex errors pre-deployment. The industry continuously seeks to enhance auditing methodologies to address these sophisticated vulnerabilities.
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