[Increased 5xx Errors] Service degradation: Increased 5xx Errors

We continue working to resolve the increased 5xx errors for CloudFront customers utilizing VPC Origins connectivity. Customers utilizing other origin types remain unaffected by this issue. We have further scoped the issue down to routing table capacity within the packet processing subsystem responsible for routing requests from CloudFront's edge locations to resources within customer VPCs. We have identified and are currently testing a mitigation strategy to resolve the issue. Once testing is complete, we will deploy the mitigation in a phased approach. Based on the results from these tests, we will provide a clearer estimated time for resolution in our next update. We continue to recommend that customers who are able to do so temporarily change their origin type to resolve the errors. We will provide another update by 5:15 AM PDT, or sooner if additional information becomes available.