I just upgraded my VX9000 to 5.9.2.2, see below the AP firmware it has per-loaded.
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VX9000#sh ver
VX9000 version 5.9.2.2-005R
Copyright (c) 2004-2018 Extreme Networks, Inc. All rights reserved.
Booted from primary
VX9000 uptime is 0 days, 00 hours 53 minutes
CPU is Intel(R) Xeon(R) CPU E5-1603 0 @ 2.80GHz, No. of CPUs 1
Base ethernet MAC address is 0X-0X-0X-0X-0X-0X
System serial number is 0X-0X-0X-0X-0X-0X
Model number is VX-9000
VX9000#sh device-upgrade versions
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CONTROLLER DEVICE-TYPE VERSION
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VX9000 ap621 none
VX9000 ap622 5.9.2.2-005R
VX9000 ap650 none
VX9000 ap6511 none
VX9000 ap6521 none
VX9000 ap6522 5.9.2.2-005R
VX9000 ap6532 none
VX9000 ap6562 5.9.2.2-005R
VX9000 ap71xx 5.9.2.2-005R
VX9000 ap7502 5.9.2.2-005R
VX9000 ap7522 5.9.2.2-005R
VX9000 ap7532 5.9.2.2-005R
VX9000 ap7562 5.9.2.2-005R
VX9000 ap7602 5.9.2.2-005R
VX9000 ap7612 5.9.2.2-005R
VX9000 ap7622 5.9.2.2-005R
VX9000 ap7632 5.9.2.2-005R
VX9000 ap7662 5.9.2.2-005R
VX9000 ap81xx 5.9.2.2-005R
VX9000 ap82xx none
VX9000 ap8432 5.9.2.2-005R
VX9000 ap8533 5.9.2.2-005R
VX9000 nx45xx none
VX9000 nx5500 none
VX9000 nx65xx none
VX9000 nx75xx none
VX9000 nx9000 none
VX9000 nx9600 none
VX9000 rfs4000 none
VX9000 rfs6000 none
VX9000 rfs7000 none
VX9000 vx9000 none
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VX9000#
