Hacks

Crypto hacks using Arithmetic Error

Data as of 3 October 2026

34 recorded incidents using Arithmetic Error took $561.0M in total between 2020 and 2026. The largest was Cetus CLMM, $223.0M in 2025. That is 2.6% of all incidents in DefiLlama's record and 2.7% of the value lost. Amounts are the losses DefiLlama records, and its record does not say whether they are before or after any recovery. Data as of 3 October 2026.

By year, using Arithmetic Error

2020 $9.7M lost

2 incidents
2021 $229.1M lost

8 incidents
2022 $1.0M lost

2 incidents
2023 $7.7M lost

4 incidents
2024 $112K lost

4 incidents
2025 $223.2M lost

3 incidents
2026 $90.2M lost

11 incidents

Incidents per year using Arithmetic Error, with value lost in millions of US dollars. Source: DefiLlama, retrieved 3 October 2026.

Incidents using Arithmetic Error

Incidents using Arithmetic Error. Newest first. Source: DefiLlama.
Date	Incident	Class	Technique	Chains	Amount
2026-09-04	Notional V2	Token & Share Accounting	Arithmetic Error	Ethereum	$1.7M
2026-08-24	Nesa	Token & Share Accounting	Arithmetic Error	Nesa	$50.0M
2026-08-24	PacaSwap DEX	Token & Share Accounting	Arithmetic Error	Constellation	$91K
2026-08-22	KiiChain	Token & Share Accounting	Arithmetic Error	KiiChain	$9.7M
2026-08-09	USM	Token & Share Accounting	Arithmetic Error	Ethereum	$136K
2026-07-14	Drips Network	Token & Share Accounting	Arithmetic Error	Ethereum	$25K
2026-06-28	AIDC	Token & Share Accounting	Arithmetic Error	BSC	$121K
2026-06-17	Little Boy Plus	Token & Share Accounting	Arithmetic Error	BSC	$367K
2026-04-28	JUDAO	Token & Share Accounting	Arithmetic Error	BSC	$228K
2026-01-08	Truebit	Token & Share Accounting	Arithmetic Error	Ethereum	$26.4M
2026-01-05	TMX TRIBE	Token & Share Accounting	Arithmetic Error	Arbitrum	$1.4M
2025-06-19	Bankroll Network	Token & Share Accounting	Arithmetic Error	BSC	$65K
2025-05-22	Cetus CLMM	Token & Share Accounting	Arithmetic Error	Sui	$223.0M
2025-03-28	Alkimiya	Token & Share Accounting	Arithmetic Error	Ethereum	$96K
2024-11-21	Matez	Token & Share Accounting	Arithmetic Error	BSC	$80K
2024-05-29	Scroll Token	Token & Share Accounting	Arithmetic Error	Ethereum	$0
2024-05-08	GPU	Token & Share Accounting	Arithmetic Error	BSC	$32K
2024-04-27	BNBX	Token & Share Accounting	Arithmetic Error	BSC	$0
2023-10-18	HOPE Lend	Token & Share Accounting	Arithmetic Error	Ethereum	$825K
2023-08-24	GSS	Token & Share Accounting	Arithmetic Error	BSC	$25K
2023-05-05	DEUS Finance	Token & Share Accounting	Arithmetic Error	Arbitrum, BSC, Ethereum	$6.5M
2023-03-15	Poolz Network	Token & Share Accounting	Arithmetic Error	BSC	$390K
2022-07-25	LPC	Token & Share Accounting	Arithmetic Error	BSC	$45K
2022-04-21	Zeed Finance	Token & Share Accounting	Arithmetic Error	BSC	$1.0M
2021-12-21	Gamma	Token & Share Accounting	Arithmetic Error	Ethereum	$4.5M
2021-12-05	Pizza DeFi	Token & Share Accounting	Arithmetic Error	EOS	$5.0M
2021-09-29	Compound V2	Token & Share Accounting	Arithmetic Error	Ethereum	$147.0M
2021-09-15	NowSwap	Token & Share Accounting	Arithmetic Error	Ethereum	$1.1M
2021-06-29	Merlin	Token & Share Accounting	Arithmetic Error	BSC	$330K
2021-05-23	Bogged Finance	Token & Share Accounting	Arithmetic Error	BSC	$3.0M
2021-05-07	ValueDefi	Token & Share Accounting	Arithmetic Error	BSC	$11.0M
2021-04-28	Uranium Finance	Token & Share Accounting	Arithmetic Error	BSC	$57.2M
2020-12-29	Cover Protocol	Token & Share Accounting	Arithmetic Error	Ethereum	$9.4M
2020-09-10	SYFI	Token & Share Accounting	Arithmetic Error	Ethereum	$250K

Source: DefiLlama, retrieved 3 October 2026, under its open methodology. Figures are a dated snapshot, not a live feed.