{"id":"CVE-2026-72055","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-72055","summary":"net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink\n\nvti6_changelink() operates on at most two netns, dev_net(dev) and the\ntunnel link netns t->net. They differ once the device is created in or\nmoved to a netns other than the one the request runs in. The rtnl\nchangelink path checks CAP_NET_ADMIN only against dev_net(dev), so a\ncaller privileged there but not in t->net can rewrite a tunnel that\nlives in t->net.\n\nGate vti6_changelink() on rtnl_dev_link_net_capable() at its top,\nbefore any attribute is parsed.","published":"2026-08-15T05:52:11.413Z","modified":"2026-08-16T03:48:31.511289779Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.261"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0b2f9c908f930ec4be17d389723f9a202d6a883c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c64b9ae7eb97e81d54b792910a3aeafd92566c79"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e2ac3b242c37dff323a964962e43854f4b1a2b79"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ef897249dc957089e6f7f11ceea699e093ad51bd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f5254e7766b4ac02b66b2ccef896cd278503cb11"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f97e93ebf2f9b8ef3b87f7a9371255e84d151587"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72055.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72055"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-16T03:48:31.511289779Z"}}