$ oc get clusterversion
NAME VERSION AVAILABLE PROGRESSING SINCE STATUS
version 4.11.20 True False 43h Cluster version is 4.11.20

$ oc get clusterrolebinding system:openshift:kube-controller-manager:gce-cloud-provider -o yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  creationTimestamp: "2023-01-11T13:16:47Z"
  name: system:openshift:kube-controller-manager:gce-cloud-provider
  resourceVersion: "6079"
  uid: 82a81635-4535-4a51-ab83-d2a1a5b9a473
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:openshift:kube-controller-manager:gce-cloud-provider
subjects:
- kind: ServiceAccount
  name: cloud-provider
  namespace: kube-system

$ oc get sa cloud-provider -n kube-system
Error from server (NotFound): serviceaccounts "cloud-provider" not found

The serviceAccount cloud-provider does not exist. Neither in kube-system nor in any other namespace.

It's therefore not clear what this ClusterRoleBinding does, what use-case it does fulfill and why it references non existing serviceAccount.

From Security point of view, it's recommended to remove non serviceAccounts from ClusterRoleBindings as a potential attacker could abuse the current state by creating the necessary serviceAccount and gain undesired permissions.

OpenShift Container Platform 4 (all version from what we have found)

Always

1. Install OpenShift Container Platform 4
2. Run oc get clusterrolebinding system:openshift:kube-controller-manager:gce-cloud-provider -o yaml

$ oc get clusterrolebinding system:openshift:kube-controller-manager:gce-cloud-provider -o yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  creationTimestamp: "2023-01-11T13:16:47Z"
  name: system:openshift:kube-controller-manager:gce-cloud-provider
  resourceVersion: "6079"
  uid: 82a81635-4535-4a51-ab83-d2a1a5b9a473
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:openshift:kube-controller-manager:gce-cloud-provider
subjects:
- kind: ServiceAccount
  name: cloud-provider
  namespace: kube-system

$ oc get sa cloud-provider -n kube-system
Error from server (NotFound): serviceaccounts "cloud-provider" not found

The serviceAccount called cloud-provider to exist or otherwise the ClusterRoleBinding to be removed.

Finding related to a Security review done on the OpenShift Container Platform 4 - Platform