Ethereum is Experiencing an Unintended Chain Split

Source: AdobeStock / Sergey Nivens

It looks like a bug in older variations of Ethereum (ETH) Geth consumer, specifically variations v1.10.07 and earlier, has prompted a cut up.

“Fork between newest geth and older geth on mainnet. Stay away from doing txs for awhile until confirmed, until you might be positive you might be submitting to newest geth,” tweeted Yearn Finance Founder Andre Cronje, advising: “Go for a stroll outdoors, all of us want it.”

A client is a software program used to run nodes, and customers obtain and utilise it to confirm transactions on the community. Clients hold the community protected and the info correct.

Per, Geth is the preferred Ethereum consumer that accounts for 74.63% of the community nodes. Out of those, over 72% of Geth nodes are operating older variations of the consumer, which means that the bug could have an effect on roughly 54% of Ethereum nodes. An address has additionally been identified by The Block Research because the handle that exploited the bug.


According to Ethereum core developer Tim Beiko, Flexpool,, and Binance swimming pools “appear to be have been mining on the mistaken Geth model.” The former appears to have been the one to report the difficulty, whereas builders are “getting in contact with the 2 latter ones,” stated Beiko.

The bug could result in double spend exploits the place customers spend cryptocurrency however the transaction is overwritten on an different chain.

However, Martin Swende, Security Lead on the Ethereum Foundation, said that “most miners have been already up to date, and the proper chain is additionally the longest (canon).”

Swende added that the “experiment with public bulletins for hotfixes” was “profitable in as far as most miners had upgraded in time — so the canon chain grew to become longer than the unhealthy chain.”

Meanwhile, Polygon (beforehand – Matic Network) stated that almost all most validators have already upgraded to the most recent Geth/Bor model on the Polygon PoS (proof-of-stake) mainnet. “The staff is monitoring the community for now,” they said.

The bug was initially discovered someday previous to August 24, 2021, and was instantly shared and acknowledged by the Go Ethereum staff. Sentnl, the staff who found the bug throughout Telos EVM audit, stated that the bug was “of a excessive severity” and demanded an “emergency sizzling patch.”

Go Ethereum builders then launched a patch on August 24 however it works solely for individuals who have since up to date their nodes. The builders confirmed it in the present day once more:


All Ethereum node runners are inspired to replace their Geth shoppers to v1.10.8.

At 15:23 UTC, ETH is buying and selling at USD 3,248. It’s up 4.3% in a day and three.3% in every week.

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Learn extra:
– Disclosed: Ethereum ‘Lived’ With a Major Threat for 18 Months
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– EIP-1559 Three Weeks Later: ETH 100,000 Burned, Supply Grows
– Ethereum’s MEV Vulnerability To Be ‘Less of a Problem’ – Buterin

– Vitalik Buterin Not Sure ‘When ETH 2.0’ however Says Clients Can Launch it Alone
– Ethereum 2.0 Multi-Client Testnet Medalla Up 30% in Active Validators

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About the Author: Daniel