Incident All ledgers
Cetus CLMM: $223.0m
Cetus CLMM lost $223.0m on 22 May 2025. Ranked 20th of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 22 May 2025
- Lost
- $223.0m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Token & Share Accounting
- Method
- Arithmetic Error
- Chains
- Sui
Cetus CLMM on Sui lost about $223 million after a flawed overflow check in its checked_shlw function let attackers use flashloans and narrow tick ranges to mint huge phantom liquidity for minimal deposits, then drain real reserves.
Against the ledger
- It ranks 20th of the 1,272 incidents with a known loss, and 2nd in 2025.
- It accounts for 88.6% of the $251.7m in known losses in May 2025.
- 160 incidents in the ledger are classified as Token & Share Accounting, for $1.45bn in total. This one is 15.4% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 13 Mar 2023 | Euler V1 | $197.0m | DeFi Protocol | Donation Attack | $240.0m |
| 29 Sept 2021 | Compound V2 | $147.0m | DeFi Protocol | Arithmetic Error | — |
| 03 Nov 2025 | Balancer V2 | $128.0m | DeFi Protocol | Rounding Error | — |
| 30 Aug 2026 | Tectonic | $124.5m | DeFi Protocol | Donation Attack | — |
| 05 Jun 2022 | Elrond | $113.0m | DeFi Protocol | Infinite Mint | — |
All failures in 2025 · 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, “Cetus CLMM, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/cetus-clmm-2025-05-22/. How this is built