Decentralized lending giant Aave has effectively come to a grinding halt after its core markets simultaneously reached 100% utilization, rendering users unable to withdraw billions of dollars in cryptocurrency. According to DeFi Warhold, this scenario signifies a critical lack of available funds across all major lending protocols, resulting in a freeze. Approximately $5 billion in stablecoins, including USDT and USDC, are now inaccessible due to the absence of liquidity to facilitate payouts. The crisis unfolded on April 18, following a $292 million exploit of the Kelp DAO rsETH bridge, where an attacker utilized forged cross-chain messages to mint unbacked rsETH, which was then used as collateral on Aave to borrow nearly $200 million in WETH.
As news of the 'bad debt' spread, a bank-run scenario ensued, prompting the withdrawal of $6.6 billion from the protocol within a 24-hour period. When approached for comment, Aave founder Stani Kulechov stated, 'I do not have anything useful to say.' DeFi Warhold explained that reaching 100% utilization across all markets is akin to a complete halt, indicating no available liquidity for withdrawals and an inability to process liquidations, leaving $3 billion in USDT and $2 billion in USDC without a clear exit strategy. Furthermore, the analyst warned that price fluctuations could exacerbate the bad debt, with no mechanism in place to mitigate it. This situation is deemed the worst possible scenario for a lending protocol, as the inability to execute liquidations leaves the protocol vulnerable to further bad debt without a means of self-protection.
Natalie Newson, a senior blockchain security researcher at CertiK, emphasized that Aave is in dire straits, stating that '100% utilization doesn't just mean a lack of liquidity; it means the protocol's self-defense systems are down.' Newson underscored that liquidations require liquidity to function and that without it, undercollateralized positions cannot be closed, leading to a perpetual accumulation of bad debt. This situation has left the protocol in a precarious position, from which recovery may only be possible with external assistance.
Aave's risk framework had previously anticipated the possibility of 100% utilization, with former Risk Manager Alex Bertomeu-Gilles noting in 2020 that at this level, 'no liquidity is left,' and the situation becomes 'problematic' for depositors seeking to withdraw their funds. Technical analyst Duo Nine was the first to highlight Aave's 100% utilization, explaining that the crisis began when whales such as Justin Sun and MEXC exchange withdrew billions following the rsETH exploit, initially causing the ETH market to reach 100% utilization and later spreading to USDT and USDC pools as over $6 billion in assets exited the protocol within hours.