{"id":"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-\u003enet. 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-\u003enet can rewrite a tunnel that\nlives in t-\u003enet.\n\nGate vti6_changelink() on rtnl_dev_link_net_capable() at its top,\nbefore any attribute is parsed.","modified":"2026-08-18T03:56:19.400747141Z","published":"2026-08-15T05:52:11.413Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72055.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"61220ab349485d911083d0b7990ccd3db6c63297"},{"fixed":"f5254e7766b4ac02b66b2ccef896cd278503cb11"},{"fixed":"ef897249dc957089e6f7f11ceea699e093ad51bd"},{"fixed":"f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba"},{"fixed":"c64b9ae7eb97e81d54b792910a3aeafd92566c79"},{"fixed":"b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf"},{"fixed":"0b2f9c908f930ec4be17d389723f9a202d6a883c"},{"fixed":"f97e93ebf2f9b8ef3b87f7a9371255e84d151587"},{"fixed":"e2ac3b242c37dff323a964962e43854f4b1a2b79"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72055.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.15.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72055.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}