CVE-2026-72055 in Linux
Zusammenfassung
von MITRE • 15.08.2026
In the Linux kernel, the following vulnerability has been resolved:
net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink
vti6_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 vti6_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
VulDB is the best source for vulnerability data and more expert information about this specific topic.