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. 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 system by creating a fake transfer message, resulting in the release of 116,500 rsETH from the Ethereum-side bridge without actual backing. 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, exposing Aave to potentially impaired collateral. Aave Labs swiftly contained the risk by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now hinges on Kelp's handling of the shortfall. If losses are spread across all rsETH holders, the token may experience a 15% depegging, resulting in around $124 million in bad debt for Aave. However, if losses are isolated to Layer 2 networks, the impact could be more severe, with bad debt rising to roughly $230 million, primarily affecting networks like Arbitrum and Mantle. The exploit stemmed from weaknesses in Kelp's cross-chain message verification using LayerZero, allowing the attacker to extract value from the system. This incident has raised concerns about mispriced or undercollateralized loans and has led to a $6 billion withdrawal from Aave. The report highlights Aave's indirect exposure to external systems, resulting in increased collateral risk, pressure on lending positions, and a decline in deposits. Discussions are underway to address potential losses, with Aave's DAO treasury holding approximately $181 million in assets.