Exploit Released for Unpatched Ubuntu Linux Flaw Enabling Host-Root Container Escape

T2Covered by 1 source · first reported by The Hacker News at 23 Sept, 11:12 UTC

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…

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Sources

• T2Exploit Released for Unpatched Ubuntu Linux Flaw Enabling Host-Root Container EscapeThe Hacker News23 Sept, 11:12

Vulnerabilities

• CVE-2026-80521