Cronos network resumed block production on August 30 at 23:49:01 UTC, hours after validators halted the chain to deal with an exploit on lending protocol Tectonic. The rollback restored the chain to a state before the incident, but the network hasn't said how much was lost or how the attack worked.
The halt
Cronos halted the network on August 30 after identifying an exploit in Tectonic, a lending protocol built on Cronos. Tectonic advised users not to interact with the protocol shortly after the halt. Cronos confirmed the halt and said it was investigating, but offered no immediate details on what had happened.
The rollback
Validators restored chain state to a point before the exploit, and block production resumed from block 90,896,189. The rollback effectively reversed any transactions that occurred after that point. Cronos didn't provide technical details on how the rollback was executed or quantify the assets restored.
What the researcher found
On-chain researcher Weilin Li estimated that approximately $75 million in assets were affected, with about $6 million reaching Ethereum before the halt. Li said the attacker allegedly manipulated TONIC's price by about 100 times and borrowed assets against it. Cronos hasn't confirmed the scale or the mechanism of the exploit.
What's still unknown
Cronos confirmed the halt and investigation but didn't confirm the scale or mechanism of the exploit. The network hasn't said whether users will be compensated or how the rollback affects outstanding loans. The lack of detail leaves open questions about the full impact and what happens next.
