Copy-Fail (CVE-2026-31431): Kubernetes container breakout via page-cache corruption
Copy-Fail (CVE-2026-31431) is a proof-of-concept exploit for a Linux kernel vulnerability that allows a fully unprivileged container to break out of its sandbox. It targets Kubernetes clusters with shared image layers, corrupting the page cache of binaries run by privileged DaemonSets like kube-prox