CVE-2026-52909

A flaw was found in the Linux kernel, specifically within the IPv6 Virtual Tunnel Interface ip6vti component. This vulnerability occurs because a critical flag, netnsimmutable, is not properly set on a specific network device ip6vti0 when it is initialized. This oversight could allow the device t...

Linux Distros Unpatched Vulnerability : CVE-2026-52909

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ip6vti: set netnsimmutable on the fallback device. john1988 and Noam Rathaus reported that vti6initnet does not set the netnsimmutable flag on the per-netns...

CVE-2026-52909

The CVE-2026-52909 issue affects the Linux kernel’s IPv6 Virtual Tunnel Interface (ip6_vti) fallback device: ip6_vti0 may be movable between network namespaces because netns_immutable is not set during initialisation. Multiple connected advisories confirm this root cause and indicate patches have...