Sui network mainnet experienced a service halt on May 28, 2026, caused by a crash bug in gas charging logic introduced in the v1.72 release, according to the Sui Foundation. The network resumed operations approximately six hours after the initial disruption. The Sui Foundation announced the outage via X (formerly Twitter), stating "Sui Mainnet is currently experiencing a network stall" and warning users that "transactions may be paused at this time." The crash bug stemmed from newly implemented gas fee processing logic in version 1.72, which triggered the network-wide halt. This incident marks the third significant outage for Sui mainnet, following a two-hour disruption in 2025 and a six-hour service interruption in January 2026, highlighting ongoing stability challenges for the layer-1 blockchain platform.
Technical Cause: v1.72 Gas Charging Logic Flaw
The Sui Foundation identified the root cause as "a crash bug in the gas charging logic introduced by the 1.72 release" in its resumption announcement on X. The gas charging mechanism handles transaction fee calculations and processing across the network. No additional technical details about the specific nature of the bug or affected code modules were provided in the Foundation's statements. The Sui Core team worked on resolving the issue during the six-hour outage window.
Timeline: Announcement to Resumption
The Sui Foundation first disclosed the network stall on May 28, 2026 via X, stating the Sui Core team was "actively working on a solution." Approximately six hours later, the Foundation posted a follow-up announcement: "Activity on Sui mainnet has resumed after a halt due to a crash bug in the gas charging logic introduced by the 1.72 release." The Foundation committed to sharing "a full incident review" in the coming days, without specifying an exact publication date.
Historical Context: Repeated Mainnet Disruptions
Sui mainnet has experienced multiple service interruptions since 2025. The network suffered a two-hour outage in 2025, followed by a six-hour disruption in January 2026. The May 28, 2026 incident represents the third documented mainnet halt, with the same six-hour duration as the January 2026 event. All three outages involved complete network stalls requiring Core team intervention to restore operations.
