On October 19, 2025, AWS suffered a DNS failure that knocked large swaths of its infrastructure offline for over 24 hours. Ten days later, AWS published a root-cause analysis showing that a misconfiguration in DynamoDB’s DNS system cascaded into EC2 errors and Network Load Balancer failures, ultimately bringing down critical backend services.
The detailed timeline walks through each stage—how DynamoDB lost its DNS entries, the ensuing EC2 anomalies around minute 13:41, and the Network Load Balancer issues at 16:16. For the full breakdown, check out AWS’s official RCA.
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