Exploit Released for Unpatched Ubuntu Linux Flaw Enabling Host-Root Container Escape
Unpatched Linux kernel flaw (CVE-2026-80521) enables container escape to host root, with exploit code released for Ubuntu.
A use-after-free vulnerability in the Linux kernel's AF_UNIX socket subsystem (CVE-2026-80521) enables container escape to gain root on the host. The flaw is fixed upstream but unpatched in Ubuntu's 26.04, 24.04, and 22.04 LTS releases, affecting default Docker and Kubernetes environments. Security firm DepthFirst released exploit code for Ubuntu 26.04 after discovering the bug with an AI model, highlighting the growing threat of AI-assisted vulnerability discovery.
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