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, depending on the resolution of the situation. The incident revolves around rsETH, a liquid restaking token issued by KelpDAO, which relies on a bridge mechanism to move tokens between blockchains. An attacker took advantage of this setup by creating a forged transfer message that appeared legitimate, resulting in the creation of new tokens without backing. The attacker then deposited these tokens into Aave as collateral and borrowed approximately $190 million in ETH and related assets. 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, which allowed 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 withdrawal of around $6 billion in total value locked from Aave.