A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.
https://www.ibm.com/support/pages/node/6517054
https://www.ibm.com/support/pages/node/6457273
https://security.netapp.com/advisory/ntap-20211004-0004/
https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY