Version 6.5.4 of the Elastic Stack, released on December 19, 2018, addresses several key issues in Beats and Kibana, including a fix for a regression in Kibana where the Elasticsearch timeout setting of 0 is now correctly interpreted as "no timeout," preventing visualizations from returning partial data or errors. Additionally, the "Show partial buckets" option has been reinstated in the Kibana Visualize app, and a Go routine memory leak fix in Filebeat has been incorporated into this version. The update also addresses a potential CPU denial of service vulnerability in certificate validation, identified as CVE-2018-16875. Users are encouraged to upgrade to this version for improved stability and security, with further details available in the release notes for Elasticsearch, Kibana, Beats, and Logstash.