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๐Ÿšจ Prysm Bug Hits Ethereum Validators Hard After Fusaka Upgrade ๐Ÿ’ธ Over $1 Million Lost in Missed ETH Rewards Ethereum validators running the Prysm consensus client missed out on 382 ETH โ€” worth over $1 million โ€” after a software bug caused major disruptions following the Fusaka upgrade. โš™๏ธ What Went Wrong? According to Offchain Labs, the team behind Prysm, a resource exhaustion bug caused delays in validator requests on December 4. This led to: Missed blocks Missed attestations Validators falling out of sync The issue stemmed from a previously introduced bug that only surfaced on mainnet after Fusaka went live. ๐Ÿ“‰ Network Impact in Numbers The disruption resulted in: 41 missed epochs 248 missed blocks out of 1,344 slots 18.5% missed slot rate Network participation dropping to 75% ๐Ÿ› ๏ธ Fixes and Mitigation While a temporary fix reduced immediate damage, Prysm has now rolled out permanent updates to its attestation validation logic to prevent similar failures in the future. โš ๏ธ Client Diversity Back in the Spotlight The incident has reignited concerns over Ethereumโ€™s client concentration risk. Offchain Labs warned that if Prysm had controlled a larger share of validators: More than โ…“ could have caused loss of finality More than โ…” could have finalized an invalid chain Fortunately, Ethereumโ€™s client diversity limited the broader impact. ๐Ÿ“Š Current Client Distribution Lighthouse: 51.39% Prysm: 19.06% Teku: 13.71% Nimbus: 9.25% With Lighthouse nearing risk thresholds, developers are once again urging validators to switch to alternative clients to strengthen network resilience. ๐Ÿ” The Bigger Picture This event serves as a powerful reminder: Client diversity isnโ€™t optional โ€” itโ€™s essential for Ethereumโ€™s security. ๐Ÿ”ฅ Hashtags #Ethereum #ETHValidators #BlockchainSecurity #CryptoInfrastructure #Web3 $ETH {spot}(ETHUSDT) $BNB {spot}(BNBUSDT) $SOL {spot}(SOLUSDT)
๐Ÿšจ Prysm Bug Hits Ethereum Validators Hard After Fusaka Upgrade ๐Ÿ’ธ Over $1 Million Lost in Missed ETH Rewards

Ethereum validators running the Prysm consensus client missed out on 382 ETH โ€” worth over $1 million โ€” after a software bug caused major disruptions following the Fusaka upgrade.

โš™๏ธ What Went Wrong?

According to Offchain Labs, the team behind Prysm, a resource exhaustion bug caused delays in validator requests on December 4.
This led to:

Missed blocks Missed attestations Validators falling out of sync

The issue stemmed from a previously introduced bug that only surfaced on mainnet after Fusaka went live.

๐Ÿ“‰ Network Impact in Numbers

The disruption resulted in:

41 missed epochs 248 missed blocks out of 1,344 slots 18.5% missed slot rate Network participation dropping to 75% ๐Ÿ› ๏ธ Fixes and Mitigation

While a temporary fix reduced immediate damage, Prysm has now rolled out permanent updates to its attestation validation logic to prevent similar failures in the future.

โš ๏ธ Client Diversity Back in the Spotlight

The incident has reignited concerns over Ethereumโ€™s client concentration risk.
Offchain Labs warned that if Prysm had controlled a larger share of validators:

More than โ…“ could have caused loss of finality More than โ…” could have finalized an invalid chain

Fortunately, Ethereumโ€™s client diversity limited the broader impact.

๐Ÿ“Š Current Client Distribution Lighthouse: 51.39% Prysm: 19.06% Teku: 13.71% Nimbus: 9.25%

With Lighthouse nearing risk thresholds, developers are once again urging validators to switch to alternative clients to strengthen network resilience.

๐Ÿ” The Bigger Picture

This event serves as a powerful reminder:
Client diversity isnโ€™t optional โ€” itโ€™s essential for Ethereumโ€™s security.

๐Ÿ”ฅ Hashtags

#Ethereum #ETHValidators #BlockchainSecurity #CryptoInfrastructure #Web3
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