BlockBeats News, June 1st. The Sui Foundation has released an incident analysis report on the recent three mainnet outages, attributing the three network interruptions that occurred last Thursday and Friday to two separate vulnerabilities introduced in the v1.72 upgrade. The first outage lasted approximately six and a half hours, while the second and third occurred on Friday morning and afternoon, respectively. The first two interruptions were due to a flaw in the "Address Balance" feature introduced in v1.72, which exposed a flaw in the transaction fee deduction logic. When transactions were canceled due to insufficient funds, the network still spent those funds, resulting in a negative balance that caused the validation node reconciliation process to fail.

The Foundation acknowledges that the emergency patch hastily deployed on Thursday carried a known risk of interruption. The team accepted this risk to quickly restore on-chain services, leading to another interruption on Friday morning. The third interruption was triggered by another undisclosed race condition vulnerability that occurred during the validation node restart to apply the patch. Sui stated that user funds were never at risk, the two vulnerabilities have been fixed, and a mechanism to force-terminate a stuck epoch has been established.