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 outcome dependent on the resolution of the situation. 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 exploited this setup by creating a forged transfer message, resulting in the creation of new, unbacked tokens. The attacker then deposited these tokens into Aave as collateral and borrowed approximately $190 million in ETH and related assets. Aave Labs promptly contained the risk by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now depends on how Kelp handles the shortfall, with two possible scenarios: a 15% depegging of rsETH, resulting in around $124 million in bad debt for Aave, or a more severe impact with bad debt rising to roughly $230 million if losses are isolated to Layer 2 networks. 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DeFi infrastructure and has led to a significant withdrawal of total value locked from Aave, with around $6 billion withdrawn following the incident. Discussions are underway to address potential losses, with Aave's ultimate exposure uncertain as the situation continues to evolve.