Sui Network Suffers 6-Hour Outage Following 1.72 Upgrade Bug

Onchain Data Shows Block Production Halt for Sui Mainnet

The Sui blockchain experienced a terrible web stall, halting each artifact accumulation for precisely 5 hours and 55 minutes. According to onchain information from Suiscan, the mainnet stopped processing caller checkpoints, efficaciously freezing each decentralized finance ( DeFi) activity. The Sui halfway squad confirmed the contented connected X, stating that a clang bug successful the gas charging logic introduced during the 1.72 merchandise caused the disruption.

The web archetypal alerted users that it was experiencing a stall, informing that transactions would beryllium delayed portion developers worked connected a fix. During the outage, the network’s autochthonal token SUI dropped astir 6.6%, reaching a debased of $0.90 per unit earlier partially recovering erstwhile services resumed.

Image source: X

The incidental marked the 2nd large downtime lawsuit for Sui successful 2026, pursuing a akin January web stall that kept validators offline for implicit six hours.

The Technical Reasoning Behind the Breakdown

The gas charging logic is simply a captious constituent governing transaction interest calculations, and a nonaccomplishment astatine this furniture resulted successful a implicit web frost alternatively than degraded performance. At a precocious level, the incidental was caused by an edge-case bug successful the statement perpetrate logic related to handling conflicting transactions, causing antithetic validators to scope antithetic conclusions erstwhile computing statement commits.

The Sui halfway stack utilizes aggregate layers of transaction processing, wherever statement produces an ordered watercourse of commits and deterministic execution turns those commits into checkpoints. Because validators observed that much than one-third of the stake was signing a antithetic digest, certification became impossible.

Consequently, validators connected the Sui mainnet were forced to manually place the divergence, instrumentality a hole to purge incorrect statement data, and alteration corrected logic. Even aft regular operations resumed, immoderate nodes were inactive reported to beryllium operating with degraded performance.

While the interruption was unintended, the network’s default safety-focused architecture behaved arsenic designed by preventing a user-visible fork. At the clip of the outage, Sui ranked among the apical blockchain platforms by full worth locked (TVL), securing astir $536 cardinal crossed 137 protocols.