Aave Faces Potential Losses of Up to $230 Million Following Kelp DAO Bridge Exploit

A recent exploit of the Kelp DAO and LayerZero bridge has put lending protocol Aave at risk of losing up to $230 million, with the final outcome contingent upon how the situation is resolved. According to a report by Aave Labs and LlamaRisk, the incident revolves around rsETH, a liquid restaking token issued by KelpDAO, which relies on a bridge mechanism to transfer tokens between blockchains. An attacker manipulated this setup by creating a forged transfer message, resulting in the creation of new tokens without backing, and the release of 116,500 rsETH from the Ethereum-side bridge. Instead of selling the assets, the attacker used 89,567 rsETH as collateral to borrow approximately $190 million in ETH and related assets across Ethereum and Arbitrum, leaving Aave exposed to potentially impaired collateral. Aave Labs responded by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now largely depends on how Kelp handles the shortfall, with two possible scenarios: if losses are spread across all rsETH holders, Aave may face around $124 million in bad debt, whereas if losses are isolated to Layer 2 networks, the impact could be more severe, with bad debt rising to roughly $230 million. The exploit was made possible by weaknesses in Kelp's verification of cross-chain messages using LayerZero, allowing the attacker to manipulate the process and extract value from the system. The incident has raised concerns about the safety of interconnected DeFi infrastructure and has led to a broad pullback, with around $6 billion in total value locked withdrawn from Aave. Aave's DAO treasury holds approximately $181 million in assets, and discussions are underway to address potential losses, but Kelp has not yet outlined its plan for allocating losses, leaving Aave's ultimate exposure uncertain.