On my Ubuntu 22.04 with kernel 5.19, the CX serial port of my 6300F is detected without any issues or additional drivers, and from 'dmesg' I can see it got assigned /dev/ttyACM0.
When I use 'screen' to connect, I have access to the console port:
% sudo screen /dev/ttyACM0 115200
<enter>
CX6300F login:
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Herman Robers
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If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check
https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.
In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
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