{"id":"CVE-2026-72053","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-72053","summary":"net: ipip: require CAP_NET_ADMIN in the device netns for changelink","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipip: require CAP_NET_ADMIN in the device netns for changelink\n\nipip_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 ipip_changelink() on rtnl_dev_link_net_capable() at its top,\nbefore any attribute is parsed.","published":"2026-08-15T05:52:09.924Z","modified":"2026-08-18T03:56:19.633062901Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.1.178"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/26544021d5c49cc6ae8a968ccb5033e6363854a4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68cadc3698c7de88966d306d12ec9c6217da228a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8211a26324667980a463c069469a818e71207e02"},{"type":"WEB","url":"https://git.kernel.org/stable/c/91571643e554ae89a91942380d5f5361fb7060a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/983cc4aa7e6f633b34c3ee743771252d7afa9a90"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d49edcc65e0a37cc9b386a94415c5d6670ca8b71"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72053.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72053"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:19.633062901Z"}}