CVE-2026-72054

Description

In the Linux kernel, the following vulnerability has been resolved: net: ip_vti: require CAP_NET_ADMIN in the device netns for changelink vti_changelink() operates on at most two netns, dev_net(dev) and the tunnel link netns t->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in t->net can rewrite a tunnel that lives in t->net. Gate vti_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.

References

• https://git.kernel.org/stable/c/1caf737e625143c6f23c32d2b747b1a3e42e5699
• https://git.kernel.org/stable/c/32edf8aa297745226854eda2d96c0fac66c1bb15
• https://git.kernel.org/stable/c/33fd93961557ec8e3e9958995b28684c5f949394
• https://git.kernel.org/stable/c/6d8bc0dc99472d62c57c2a3d436e6ab408592bda
• https://git.kernel.org/stable/c/88b33ee458a6ca5fbef6c53b9dba772da69dab68