REDHAT-BUG-2463728: High severity Kubevirt virt-handler vulnerability

A flaw was found in KubeVirt's virt-handler component. virt-handler connects to VM console sockets by following filesystem paths without validating symlinks. An authenticated OpenShift user with the standard edit role in a single namespace can exec into the virt-launcher pod, replace the console socket with a symlink pointing to the host's container runtime (CRI-O) socket, and hijack virt-handler's privileged connection. Since virt-handler runs with hostPID and elevated privileges, this allows the attacker to reach any unix socket on the host, potentially gaining full control of the node and cluster.