Sui suffered another network stall just hours after a validator-coordinated recovery. The blockchain resumed only after more than two-thirds of validator stake had upgraded to a patch addressing a crash bug in version 1.72. The back-to-back disruptions raise questions about the stability of the recent release.
The crash bug in Sui 1.72
The stall was triggered by a crash bug in Sui's 1.72 software release. Validators had already coordinated a recovery from an earlier outage, but the network went down again shortly after coming back online. The bug prevented nodes from processing transactions correctly, bringing block production to a halt.
Validators coordinate a fix
To restore the network, validators needed to upgrade to a fix that addressed the crash bug. The fix required a supermajority of validator stake — more than two-thirds — to apply the update before the network could resume. That threshold was met, and Sui began producing blocks again. The exact nature of the bug and why it reappeared after the initial recovery have not been detailed by the development team.
Network back online
The network is now running on the patched version. Users experienced a temporary halt in transactions during the stall, but funds were not reported lost. The incident follows a pattern of periodic outages in proof-of-stake networks when a critical bug slips into a release. The Sui team has not announced further changes to prevent a repeat.
For now, the blockchain is live again. The underlying cause of the crash bug in version 1.72 remains unresolved in the public record.
