“Fork between latest geth and older geth on mainnet. Stay away from doing txs for awhile till confirmed, unless you are sure you are submitting to latest geth,” tweeted Yearn Finance Founder Andre Cronje
A bug affecting older versions of a major Ethereum client is causing those nodes to split from the main network. This affects around 54% of Ethereum nodes.
The bug may lead to double spend exploits where users spend cryptocurrency but the transaction is overwritten on an alternative chain. The bug also impacts other EVM-compatible chains like Binance Smart Chain and Polygon.
After Ethereum core developers were informed about the issue, they released a patch on August 24 but it works only for those who have since updated their node.