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Sui mainnet halts traced to upgrade bug

Created at 1 Jun · 6:37 AM7 sources↑ Market-relevant7 events
IN SHORT

Sui's mainnet experienced three outages totaling over 18 hours due to bugs in the v1.72 software release. Issues included a gas-charging bug related to a new 'address balances' feature and a bug in the network's randomness system. No user funds were lost.

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Key Numbers

3mainnet halts
48 hourstimeframe for halts
18 hourstotal downtime
6 hoursduration of final freeze

Who's Involved

Sui Foundation
published post-mortem on network outages and deployed upgrades
Sui Core Team
completed investigation and incident review
Mysten Labs
developer of the Sui blockchain
Sui mainnet halts traced to upgrade bug

↳ Why This Matters

The Sui blockchain, a Layer 1 network developed by Mysten Labs, experienced its most disruptive period since launch with three mainnet outages occurring in under 48 hours. These disruptions, totaling over 18 hours of downtime, were attributed to bugs within the v1.72 software release, impacting network availability and raising stability concerns.

Key facts

  • Sui's mainnet experienced three outages in under 48 hours.
  • The outages were caused by bugs in the v1.72 software release.
  • A gas-charging bug related to a new 'address balances' feature caused the first two halts.
  • A separate bug in the network's randomness system caused a third halt.
  • The network experienced over 18 hours of total downtime.
  • No user funds were lost and no finalized transactions were reversed.

The Sui blockchain, a Layer 1 network developed by Mysten Labs, experienced its most disruptive period since launch with three mainnet outages occurring in under 48 hours. These disruptions, totaling over 18 hours of downtime, were attributed to bugs within the v1.72 software release, impacting network availability and raising stability concerns.

Frequently asked questions

The outages were caused by bugs in the v1.72 software release, including a gas-charging bug tied to a new 'address balances' feature and a bug in the network's randomness system.

The Sui mainnet halted three times within a 48-hour period, resulting in over 18 hours of total downtime.

This bug caused transactions to be cancelled for insufficient funds, but the system still attempted to charge gas on those funds, leading to a negative balance that crashed the validator settlement process.

The third halt was caused by a bug in the network's randomness system (DKG) where a failure status was not saved, leading validators to restart without realizing DKG had failed, stalling transactions.

What Happens Next

01The Sui Foundation published a post-mortem report detailing the incidents and steps taken.
02A more complete fix was deployed after the second halt.
03Validators installed a patch following the Friday morning halt.
04The Sui Foundation states a 'major upgrade' has been made to address the issues.

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Cadence

How It Developed

2 Jun · 3:00 AM
Sui's mainnet experienced three outages due to bugs in the v1.72 release, with the first two halts caused by gas charging issues and the third by a randomness bug.
Bitcoinist.com via PiQSuite
1 Jun · 4:45 PM
The article restates earlier reporting on Sui's multiple outages, adding specific dates for the May 2026 incidents and clarifying the duration of the first outage.
Live Bitcoin News via PiQSuite
1 Jun · 10:20 AM
Sui Crypto Network Crashed 3 Times in 48 Hours After a Single Upgrade Bug: Is SUI Actually Safe?
99Bitcoins via PiQSuite
1 Jun · 8:24 AM
The new article details the specific timing and technical causes of Sui's three mainnet halts, including validator crashes due to gas payment errors and a randomness system bug.
CoinCentral via PiQSuite
1 Jun · 6:50 AM
Sui Foundation knowingly deployed a risky fix for a gas bug, which caused a second halt, and a separate randomness bug caused a third halt.
CoinCentral via PiQSuite
1 Jun · 6:48 AM
The Sui Foundation states a "major upgrade" has fixed the bugs responsible for three recent network outages, with all systems now operational.
CoinTelegraph via PiQSuite
1 Jun · 5:38 AM
Three Sui mainnet halts were traced to a bug in a new address-balance feature interacting with gas and consensus logic, according to a post-mortem.
CoinDesk via PiQSuite

Sources

T1
Three Sui mainnet halts in 48 hours traced to an upgrade bug by developersm.piqsuite.com
T1
Sui Price: What Caused Three Mainnet Halts in 48 Hours and What Comes Nextm.piqsuite.com
T1
Sui Foundation says 'major upgrade' fixed bugs behind three outagesm.piqsuite.com
T1
Sui Mainnet Halts Three Times After v1.72 Gas Bug Exposedm.piqsuite.com
T1
Sui Crypto Network Crashed 3 Times in 48 Hours After a Single Upgrade Bug: Is SUI Actually Safe?m.piqsuite.com
T1
Sui Fixes Bugs Behind Multiple Blockchain Shutdownsm.piqsuite.com
T1
Sui Reveals What Caused Three Mainnet Halts After Major Network Upgradem.piqsuite.com

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