Exploit Released for Unpatched Ubuntu Linux Flaw Enabling Host-Root Container Escape
A use-after-free in the Linux kernel's AF_UNIX socket subsystem can be used to escape a container and gain root on the host, security firm DepthFirst said in research published September 22.
The flaw, tracked as CVE-2026-80521 (CVSS score: 7.8), was fixed upstream on August 6, but Ubuntu has not shipped the patch for its 26.04, 24.04, or 22.04 LTS releases. DepthFirst
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Raghib Awan
Raghib Awan is an Information Security and Technology professional with expertise spanning cybersecurity, cloud security, IT infrastructure, information risk, regulatory compliance, and enterprise security. He is also an author at TeQManch, a technology and cybersecurity news platform covering cyber threats, artificial intelligence, BFSI technology, data privacy, digital risk, and emerging technology trends.
