Key Takeaways
- Three consecutive network failures struck Sui’s mainnet between Thursday and Friday, all stemming from problems in the v1.72 software update.
- Initial outages resulted from a gas fee calculation error related to the newly introduced “address balances” functionality.
- Mysten Labs’ Sui Foundation acknowledged deploying an emergency patch despite knowing it could trigger additional network stalls.
- A third independent malfunction in the blockchain’s randomness generation system led to a six-hour shutdown.
- The SUI token currently sits at approximately $0.87, representing a 13% decline from last week’s $1.04 price point.
The Sui blockchain encountered an unprecedented series of network shutdowns last week, experiencing three separate mainnet failures within a 48-hour window. The Layer 1 protocol developed by Mysten Labs remained inaccessible for over 18 cumulative hours spanning Thursday, May 28 through Friday, May 29. Technical investigations confirmed all incidents originated from the v1.72 software deployment.
The initial network disruption commenced approximately 10 a.m. ET Thursday, persisting until roughly 4:30 p.m. that afternoon. Root cause analysis identified a critical flaw in the protocol’s gas fee processing mechanism associated with the freshly implemented “address balances” feature. The system attempted to deduct gas charges from transactions already rejected for insufficient funds, creating negative balance states that collapsed the validator settlement infrastructure.
Mysten Labs rolled out an emergency repair by early Thursday afternoon. However, in their official incident report released Sunday, the Foundation disclosed that engineers were aware the temporary solution carried inherent risks of precipitating subsequent failures. Leadership chose to proceed anyway, prioritizing rapid service restoration.
Deliberate Risk Acceptance Leads to Second Network Failure
The calculated gamble resulted in a second shutdown. Early Friday morning at approximately 5 a.m. ET, the blockchain went offline again when the previously identified vulnerability materialized. The identical underflow condition occurred because a distinct error code had concealed the specific exception the initial patch targeted. Engineers implemented a comprehensive solution by roughly 8:30 a.m. ET.
A third unrelated failure struck Friday afternoon, originating from an entirely different system component. When validators rebooted to apply the Friday morning update, insufficient nodes were synchronized for the distributed key generation protocol that powers Sui’s random number generation feature. The DKG process automatically disabled itself according to design specifications, but a software defect prevented the failure state from being written to persistent storage. Validators continuously restarted without recognizing the DKG failure, causing transactions dependent on randomness to accumulate indefinitely and freezing the current epoch. Network operations remained suspended from approximately 4:30 p.m. until 10:20 p.m. ET.
The Sui Foundation reported that artificial intelligence agents analyzing validator log files accelerated root cause identification across all three incidents.
Token Value Declines Amid Infrastructure Instability
SUI is exchanging hands near $0.87 as of this writing, reflecting approximately 13% depreciation from the $1.04 level observed seven days prior. Current market capitalization stands at roughly $3.49 billion. The asset reached its record high of $5.35 on January 6, 2025, placing current prices approximately 84% beneath that summit. Liquidation data shows around $1.88 million in SUI derivatives positions were forcibly closed during the outage period, with long position holders absorbing the majority of losses.
Market analyst Crypto Patel observed on X that SUI exhibits characteristics of quiet accumulation with minimal retail participation, indicating institutional actors may be establishing positions within the $0.60–$0.90 price corridor. The Relative Strength Index registers 34.51, approaching oversold threshold levels. Open interest contracted 4.17% to $705 million, while trading volume expanded 28% to $740 million.
These incidents do not represent Sui’s inaugural network disruptions. The protocol experienced a six-hour operational pause in January 2026 and encountered validator crashes in November 2024. Foundation representatives indicated plans to enhance fault isolation mechanisms so future software defects impact individual transactions rather than triggering comprehensive network halts.
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