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.

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

https://git.kernel.org/stable/c/9571af2eec8023af9a1671b7f2cd4ab400011724

https://git.kernel.org/stable/c/95cceadbfd52d7239bd730afdda0655287d77425

https://git.kernel.org/stable/c/973ead9e565423642e4533e1547b5d2c0476fb03

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