kyverno/samples/additional/policy_validate_container_capabilities.yaml

apiVersion: kyverno.io/v1alpha1
kind: ClusterPolicy
metadata:
  name: validate-container-capablities
spec:
  validationFailureAction: "audit"
  rules:
  - name: validate-container-capablities
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: "Allow certain capability to be added"
      pattern:
        spec:
          containers:
          - securityContext:
              capabilities:
                add: ["NET_ADMIN"]