Sui Foundation: Upgrade fixed bugs behind three outages

The Sui Foundation, the nonprofit behind the Sui Network, applied an upgrade over the weekend to fix software bugs that caused three outages across Thursday and Friday, restoring operations after more than 15 hours of downtime.

The Sui network uptime dashboard recorded an outage of about eight hours and 25 minutes, a second outage of 43 minutes and a third halt that lasted nearly six hours. All systems were listed as operational as of Monday.

The foundation traced the disruptions to crash bugs introduced in the network’s 1.72 software release. One bug affected gas charging by deducting funds before transactions were canceled for insufficient balances, which produced negative balances and led validators to crash. An interim fix intended to restore service carried a known, low-probability issue that triggered the third halt before a permanent solution was deployed.

In a blog post, the foundation wrote, “As of now, validators have fully addressed the known issues caused by both the original gas-charging bug and the randomness-state bug, and network activity has resumed.” The post added that no user funds were at risk and that the network did not revert any committed transactions when it resumed.

The foundation said the incident highlighted areas for improvement and listed priorities including stronger failure containment, improved resilience at end-of-epoch transitions and further investment in artificial intelligence agents. The group has used AI agents to diagnose problems, query validator logs and assemble operational metrics.

The outages affected the SUI token price. Price data from CoinGecko show SUI fell from about $0.99 before the first outage to roughly $0.88 by Monday, a decline of about 11 percent. The token had risen to $1.41 in early May after a Nasdaq-listed company staked a large portion of the supply.

Sui launched its mainnet in May 2023 with a focus on high throughput and fast transactions. The network ranks 13th by total value locked at roughly $519 million and hosts 137 protocols, according to DeFiLlama. Sui experienced a more than six-hour outage in January and a validator crash-loop incident in November 2024 that lasted about two and a half hours.