CVE-2026-72055
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.
Affected versions
Linux kernel versions
3.15
and later are affected. Fixed in
5.10.261,
5.15.212,
6.1.178,
6.6.145,
6.12.97,
6.18.40,
7.1.5,
7.2-rc1
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-72055?
CVE-2026-72055 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.15 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-72055 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-2026-72055?
Yes. CVE-2026-72055 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 3.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-72055 actively exploited?
No. CVE-2026-72055 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.