CVE-2026-72061
Description
In the Linux kernel, the following vulnerability has been resolved: net: sit: require CAP_NET_ADMIN in the device netns for changelink ipip6_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 ipip6_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed. sit was the one tunnel type not covered by the recent series that added this check to the other changelink() handlers.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://git.kernel.org/stable/c/27ccb68e7cccead5d8c611665a45d23032d468b3
- https://git.kernel.org/stable/c/3118e97dae533fb45964b87bbed1801afcff7c65
- https://git.kernel.org/stable/c/388ccffbd2e7e5e4271f291085a7451865705305
- https://git.kernel.org/stable/c/7d139dec96691cde96cb40ed293e2d13d994fb4f
- https://git.kernel.org/stable/c/99ae3248b33df94201915d9c32e7470cdf08cfcd
- https://git.kernel.org/stable/c/c0ea1aedb37bb979e864ed7787975434bbd9db73
- https://git.kernel.org/stable/c/c5a0ae895432596b2f464172da8218e2d84e2932
- https://git.kernel.org/stable/c/cb41b308e9d867725d965b291dd085028e36a480
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.