The Sui blockchain has resumed operations after a six-hour outage, with transactions returning to normal.
The Sui network, a layer one blockchain, has resumed its operations after experiencing a six-hour outage. The development team confirmed that block processing has returned to normal.
The Sui network is back online and fully operational. Transactions are flowing normally. If you are still experiencing issues, please refresh your app or browser. We appreciate your patience and will provide a complete incident report soon.
— Sui (@SuiNetwork) January 14, 2026
Users were notified of the disruptions on January 14, though the exact cause remains unclear. The team has committed to releasing further details about the incident shortly.
During the outage, the price of the SUI token saw a brief increase of 4% but has since decreased by 2%, currently trading at $1.79.
This incident marks the second major outage since Sui's launch in May 2023. The network previously encountered a two-hour disruption in November 2024.
There is speculation within the community that a denial-of-service (DOS) attack may have contributed to this outage. According to the developers, the issue arose from a flaw in the transaction scheduling algorithm.
Similar outages have affected other blockchain networks, including Solana, which experienced a significant halt in February 2024 due to performance drops that required a restart to resolve.
Additionally, in November 2025, Sui announced plans for the upcoming launch of its USDsui stablecoin, expected to debut in 2026.
