CVE-2026-72051
In the Linux kernel, the following vulnerability has been resolved: net: ip6_tunnel: require CAP_NET_ADMIN in the device netns for changelink ip6_tnl_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 ip6_tnl_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
Affected versions
Linux kernel versions
3.12
and later are affected. Fixed in
6.6.148,
6.12.101,
6.18.40,
7.1.5,
7.2-rc1
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-72051?
CVE-2026-72051 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.12 onward and has been patched in 6.6.148, 6.12.101, 6.18.40 and others. CVE-2026-72051 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-72051?
Yes. CVE-2026-72051 has been patched. Fixed versions include 6.6.148, 6.12.101, 6.18.40 and others. If you are running Linux kernel 3.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-72051 actively exploited?
No. CVE-2026-72051 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.