CVE-2026-72136

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink xfrmi_changelink() operates on at most two netns, dev_net(dev) and the interface link netns xi->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 xi->net can rewrite an interface that lives in xi->net. Gate xfrmi_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.

References

• https://git.kernel.org/stable/c/04c1aa57d08471b1953bf27c84ac9b3d78d71831
• https://git.kernel.org/stable/c/095515d89b19b6cc19dfcdc846f97403ed1ebce3
• https://git.kernel.org/stable/c/37b61946d278c7deb0d40ba8f2b6fc0478d61dab
• https://git.kernel.org/stable/c/3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea
• https://git.kernel.org/stable/c/80ec68bba11f7f387c0e4099c2d7b2c84943eb99