Last Modified: Dec 06, 2025
Affected Product(s):
BIG-IP LTM
Known Affected Versions:
17.5.0, 17.5.1, 17.5.1.2, 17.5.1.3
Opened: Jul 01, 2025 Severity: 3-Major
There are "vmbus_open subchannel failed: -12" kernel errors for uio module, uio_hv_generic. These errors prevent the TMM module from finishing initialization.
Azure VM is unable to reach Active state.
-- Using VE Azure -- Using Azure instances with <= 16 vCPUs
Use an Azure instance with more RAM. For example, F8s_v2 has 16 GiB of RAM and has a total limit of 4 interfaces. Instance size, E8ds_v5, has 64 GiB of RAM and can reach Active state with 4 interfaces.
None