Understanding KubeVirt’s Host Kernel and Userspace Dependencies

KubeVirt runs each VM inside a virt-launcher pod. QEMU and libvirt are userspace processes scheduled like any other container, with host kernel devices ( /dev/kvm , /dev/vhost-net , /dev/net/tun ) mapped in. Like any workload that probes kernel device capabilities, a mismatch between the userspace stack and the host kernel can cause failures.