kyverno.yaml

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: psp-allowprivilegeescalation
spec:
  validationFailureAction: Enforce
  rules:
  - name: psp-allowprivilegeescalation
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: >-
        Privilege escalation is disallowed. The fields
        spec.containers[*].securityContext.allowPrivilegeEscalation, and
        spec.initContainers[*].securityContext.allowPrivilegeEscalation, and
        spec.ephemeralContainers[*].securityContext.allowPrivilegeEscalation must
        be undefined or set to `false`.
      pattern:
        spec:
          =(initContainers):
          - =(securityContext):
              =(allowPrivilegeEscalation): "false"
          =(ephemeralContainers):
          - =(securityContext):
              =(allowPrivilegeEscalation): "false"
          containers:
          - =(securityContext):
              =(allowPrivilegeEscalation): "false"