Key Takeaways
- The Sui blockchain experienced three network freezes between Thursday and Friday, all stemming from its v1.72 software update.
- Initial failures occurred due to a gas fee calculation error related to the newly introduced “address balances” functionality.
- Mysten Labs and the Sui Foundation acknowledged deploying a temporary patch despite knowing it could trigger additional network failures.
- A third independent issue involving the network’s distributed random number generation system resulted in approximately six hours of downtime.
- The SUI token is currently valued at approximately $0.87, representing a 13% decline from its $1.04 price point seven days prior.
The Sui blockchain network encountered three separate mainnet failures within a two-day window last week, representing the most significant service disruption since the platform’s initial launch. The Layer 1 protocol, developed by Mysten Labs, remained non-operational for over 18 cumulative hours spanning Thursday, May 28, and Friday, May 29. Engineers traced all three incidents to problems originating from the v1.72 software deployment.
The initial network freeze commenced at approximately 10 a.m. Eastern Time on Thursday, continuing until roughly 4:30 p.m. that afternoon. Engineers identified the root cause as a defect in the protocol’s gas fee processing mechanism connected to a newly implemented feature called “address balances.” The system attempted to charge transaction fees even after canceling transactions due to insufficient account balances. This created negative balance scenarios that caused the validator settlement mechanism to fail catastrophically.
The Sui Foundation rolled out an emergency patch by early afternoon Thursday. However, in a detailed incident report released Sunday, Foundation representatives acknowledged their technical team understood the temporary solution posed risks of triggering subsequent network failures. They proceeded with deployment to prioritize rapid service restoration.
Deliberate Risk Leads to Second Network Failure
That calculated gamble resulted in a second outage. Friday morning around 5 a.m. Eastern Time witnessed another network collapse when the previously identified vulnerability activated. The identical underflow error occurred because a different system error code concealed the specific condition the initial patch was engineered to prevent. Engineers deployed a comprehensive fix by approximately 8:30 a.m. Eastern Time.
A third distinct outage struck Friday afternoon, originating from an entirely different technical issue. When validators rebooted to implement the Friday morning update, insufficient nodes achieved readiness for the distributed key generation procedure powering the network’s randomness functionality. This process automatically disabled itself according to design specifications, but a software defect prevented the failure state from persisting to storage. Validators continued restart cycles without recognizing the DKG failure, causing transactions dependent on randomness to accumulate indefinitely and freezing the current epoch. Network services remained unavailable from approximately 4:30 p.m. until 10:20 p.m. Eastern Time.
According to the Sui Foundation, artificial intelligence systems with access to validator logging data accelerated diagnostic procedures throughout all three incidents.
Token Value Declines Amid Network Instability
SUI was valued at approximately $0.87 during publication, reflecting a 13% decrease from the $1.04 price recorded seven days earlier. The cryptocurrency maintains a market capitalization of roughly $3.49 billion. The token reached its historical peak of $5.35 on January 6, 2025, placing current trading levels approximately 84% below that maximum. Liquidations totaling around $1.88 million in SUI derivative positions occurred during the three network halts, with traders maintaining long positions absorbing the majority of losses.
Cryptocurrency market analyst Crypto Patel observed on X that SUI demonstrates a subtle accumulation formation with minimal retail investor engagement, indicating institutional participants may be building positions within the $0.60–$0.90 price corridor. The Relative Strength Index registers near 34.51, approaching oversold conditions. Open interest contracted 4.17% to $705 million, while trading volume expanded 28% to $740 million.
These outages represent recurring challenges for the Sui network. The blockchain suffered a six-hour operational freeze in January 2026 and experienced a validator system crash in November 2024. Foundation representatives indicated plans to enhance failure isolation mechanisms so future software defects affect individual transactions rather than triggering comprehensive network halts.
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