Detections
Analytics
CVE-2026-52909
high
Description
In the Linux kernel, the following vulnerability has been resolved: ip6_vti: set netns_immutable on the fallback device. john1988 and Noam Rathaus reported that vti6_init_net() does not set the netns_immutable flag on the per-netns fallback tunnel device (ip6_vti0). Other similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel) correctly set this flag during their fallback device initialization to prevent them from being moved to another network namespace.
References
https://git.kernel.org/stable/c/f4b6b4af7ef0661ac153c6f7eb1030aa8482c1a3
https://git.kernel.org/stable/c/ecf8904067dcba0dad86ece80874841e60317885
https://git.kernel.org/stable/c/dcdce3bc9f08026ff3739ee7339e1bef526fc5f3
https://git.kernel.org/stable/c/d289d5307762d1838aaece22c6b6fcad9e8865f9
https://git.kernel.org/stable/c/c5dbd669db5a426b3025512322e1bf2cdbe14305
https://git.kernel.org/stable/c/7f28e3948c59481f8db9c9638e204258d26b4e41
https://git.kernel.org/stable/c/12c65e2c7fef507551bd7b52123598a761662c01
https://git.kernel.org/stable/c/12acc977838c943636fb01e2f3087d2e4cc3b7cc