Core Insights - Starknet experienced a brief mainnet outage due to inconsistencies between the execution layer and the proof layer, leading to transaction execution anomalies [1] - The incident resulted in a block reorganization, with approximately 18 minutes of on-chain activity being rolled back [1] - This marks the second significant disruption since 2025, following a previous incident in September that caused over 5 hours of downtime and rolled back about 1 hour of on-chain activity [1] Summary by Categories - **Incident Details** - The outage was caused by an error in the execution layer that incorrectly recorded a state write that had been rolled back [1] - Related transactions did not receive finality confirmation on Layer 1 [1] - **Impact** - Approximately 18 minutes of on-chain activity was affected by the rollback [1] - The previous major outage in September was due to a sequencer vulnerability, resulting in over 5 hours of downtime [1]