BIG-IP HSB vulnerability CVE-2024-39778

When a stateless virtual server is configured on a BIG-IP system with a High-Speed Bridge (HSB), undisclosed requests can cause virtual servers to stop processing client connections and the Traffic Management Microkernel (TMM) to terminate. (CVE-2024-39778)

https://my.f5.com/manage/s/article/K05710614 

what does High-Speed Bridge (HSB) mean ? and from where i can check this ? also if HSB not enabled so does this mean i am not vulnerable ?