Sui Blockchain Halts for 6 Hours in Consensus Glitch

The Sui blockchain network experienced a six-hour halt on January 14, 2026, disrupting transaction processing and freezing more than $1 billion in onchain value across its ecosystem. The outage, which began around 2:52 p.m. UTC, stemmed from a rare divergence in validator consensus and was resolved later that evening at 8:44 p.m. UTC, restoring full operations without any loss of user funds or state inconsistencies.

The disruption occurred due to an edge-case bug in the consensus commit logic, triggered under specific garbage collection conditions. This led validators to compute conflicting candidate checkpoints, with more than one-third of the network's stake signing differing digests. As a result, checkpoint certification stalled, halting new block production and causing submitted transactions to time out. Read operations, however, continued to serve data from the last certified state, maintaining access to existing onchain information for users and applications.

Sui's safety-focused architecture activated as designed during the incident, prioritizing state consistency over continued availability to prevent forks or irreversible errors. The Sui Foundation emphasized that the...