Ethereum Client Prysm Releases Analysis on Fusaka Mainnet Issue

According to ChainCatcher, the Prysm team, responsible for the Ethereum consensus layer client, has published an analysis report on the Fusaka mainnet issue. During the incident, nearly all Prysm nodes experienced resource exhaustion while processing specific proofs, resulting in an inability to respond promptly to validator requests. The fault affected epochs 411439 to 411480, with 248 blocks lost across 42 epochs, leading to a missing rate of 18.5%. Network participation dropped to a low of 75%, and validators lost approximately 382 ETH in proof rewards. The root cause was identified as Prysm beacon nodes receiving proofs from potentially unsynchronized nodes, which referenced block roots from previous rounds. To verify these proofs, Prysm attempted to reconstruct compatible states, causing repeated processing of past round blocks and costly recalculations of round conversions. The team temporarily addressed the issue by advising users to use the --disable-last-epoch-target parameter. Future versions v7.1 and v7.1.0 will include long-term solutions.