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 transfer tokens between blockchains. An attacker took advantage of this setup by creating a forged 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 around $190 million in ETH and related assets across Ethereum and Arbitrum, leaving Aave vulnerable to 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 the potential for a 15% depegging of the token if losses are spread across all rsETH holders, resulting in approximately $124 million in bad debt for Aave. If losses are isolated to Layer 2 networks, the impact could be more severe, with bad debt rising to around $230 million, primarily affecting networks such as Arbitrum and Mantle. The exploit was made possible by weaknesses in Kelp's verification process for cross-chain messages using LayerZero, allowing the attacker to manipulate the system and extract value. The incident has raised concerns about the security of interconnected DeFi infrastructure, with around $6 billion in total value locked withdrawn from Aave following the incident. The report notes that Aave's DAO treasury holds approximately $181 million in assets, and discussions are underway with ecosystem participants to address potential losses. However, Kelp has not yet outlined its plan for allocating losses, leaving Aave's ultimate exposure uncertain.