# Elasticsearch/Kibana Service Startup Failure Due to Unsupported CPU Instruction Set

**URL:** <https://discuss.elastic.co/t/elasticsearch-kibana-service-startup-failure-due-to-unsupported-cpu-instruction-set/386231>\
**Category:** Elastic Search\
**Created:** [May 8, 2026, 6:10am UTC](https://discuss.elastic.co/t/elasticsearch-kibana-service-startup-failure-due-to-unsupported-cpu-instruction-set/386231 "2026-05-08T06:10:32Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![RainTown](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/raintown/32/140206_2.png) [@RainTown](https://discuss.elastic.co/u/RainTown)\
**Post date:** [May 15, 2026, 10:10am UTC](https://discuss.elastic.co/t/elasticsearch-kibana-service-startup-failure-due-to-unsupported-cpu-instruction-set/386231/5 "2026-05-15T10:10:32Z")

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As given above, there's a parallel thread on this topic, found [here](https://discuss.elastic.co/t/elasticseach-9-4-0-wont-start-on-nehalem-cpu-does-not-support-all-the-following-cpu-features/386216)

As noted there, 9.4.1 does not contain a fix, 9.4.2 might, and the pull request includes a (better temporary) workaround if needed. Maybe also best to watch that other thread for updates going forward.

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_[View the full topic](https://discuss.elastic.co/t/elasticsearch-kibana-service-startup-failure-due-to-unsupported-cpu-instruction-set/386231)._