An exploit has been released targeting a use-after-free vulnerability in the Linux kernel’s AF_UNIX socket subsystem, tracked as CVE-2026-80521. This flaw allows attackers to escape containers and escalate privileges to root on the underlying host. While an upstream fix exists, several Ubuntu LTS releases lack the official patches, posing a significant risk to container environments.

CVE-2026-80521Linux KernelContainer EscapeUbuntu
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