Aave Faces Potential $230 Million Loss 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, pending the outcome of the situation. According to a report by Aave Labs and LlamaRisk, the incident involves 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 fake transfer message, resulting in the creation of new tokens without backing, and releasing 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 quickly 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 would face around $124 million in bad debt, but if losses are isolated to Layer 2 networks, the impact would be more severe, with bad debt rising to roughly $230 million. The exploit was caused by weaknesses in Kelp's verification of cross-chain messages using LayerZero, allowing the attacker to extract value from the system. This incident has raised concerns about the safety of interconnected DeFi infrastructure and has led to a pullback in user participation, with around $6 billion in total value locked withdrawn from Aave. The report notes that Aave's DAO treasury holds approximately $181 million in assets, and discussions are underway to address potential losses.