Incident All ledgers
Grim Finance: $30.0m
Grim Finance lost $30.0m on 18 December 2021. Ranked 101st of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 18 December 2021
- Lost
- $30.0m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Reentrancy
- Method
- Reentrancy
- Chains
- Fantom
Grim Finance lost about $30 million after attackers exploited missing reentrancy guards in its GrimBoostVault, using nested calls during safeTransferFrom to make repeated deposits that built up false collateral.
Against the ledger
- It ranks 101st of the 1,272 incidents with a known loss, and 23rd in 2021.
- It accounts for 5.1% of the $588.3m in known losses in December 2021.
- 61 incidents in the ledger are classified as Reentrancy, for $458.1m in total. This one is 6.5% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 17 Jun 2016 | The DAO | $60.0m | DeFi Protocol | Reentrancy | — |
| 09 Jul 2025 | GMX V1 EVM | $42.0m | DeFi Protocol | Reentrancy | $40.0m |
| 03 Sept 2024 | Penpie | $27.0m | DeFi Protocol | Reentrancy | — |
| 19 Apr 2020 | dForce Lending | $25.0m | DeFi Protocol | Reentrancy | — |
| 30 Aug 2021 | CREAM Lending | $18.8m | DeFi Protocol | Reentrancy | — |
All failures in 2021 · The failures ledger
Amounts are DefiLlama’s estimates and can change as incidents are revalued. Its returned figure can include money a company repaid itself, not only funds recovered from attackers. Source: DefiLlama.
Cite this Bitminer.io, “Grim Finance, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/grim-finance-2021-12-18/. How this is built