Description
In the Linux kernel, the following vulnerability has been resolved: net: ipip: require CAP_NET_ADMIN in the device netns for changelink ipip_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 ipip_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
References8
- git.kernel.org/stable/c/068ad9b85f681755f751ebab82ae98146cec163d
- git.kernel.org/stable/c/26544021d5c49cc6ae8a968ccb5033e6363854a4
- git.kernel.org/stable/c/68cadc3698c7de88966d306d12ec9c6217da228a
- git.kernel.org/stable/c/8211a26324667980a463c069469a818e71207e02
- git.kernel.org/stable/c/91571643e554ae89a91942380d5f5361fb7060a2
- git.kernel.org/stable/c/983cc4aa7e6f633b34c3ee743771252d7afa9a90
- git.kernel.org/stable/c/a7d2642a50282322bc33f34ee7305f2b793df494
- git.kernel.org/stable/c/d49edcc65e0a37cc9b386a94415c5d6670ca8b71
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 4 · as of 11 November 2026
- CWE
- CWE-862
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