AWS’s October 19, 2025 DNS Outage Explained

AWS went dark for over a day when a misconfiguration in DynamoDB took down its DNS, triggering a cascade of errors across EC2 and the Network Load Balancer. Ten days later, the official root-cause analysis revealed exactly how that initial slip led to a full-blown outage.

In this breakdown, you’ll get a quick summary (0:00), a dive into how Dynamo lost its DNS (5:30), the resulting EC2 errors (13:41) and Network Load Balancer hiccups (16:16), plus a link to the full AWS report.

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