{"id":"CVE-2026-72061","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-72061","summary":"net: sit: require CAP_NET_ADMIN in the device netns for changelink","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sit: require CAP_NET_ADMIN in the device netns for changelink\n\nipip6_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 ipip6_changelink() on rtnl_dev_link_net_capable() at its top,\nbefore any attribute is parsed. sit was the one tunnel type not covered\nby the recent series that added this check to the other changelink()\nhandlers.","published":"2026-08-15T05:52:15.823Z","modified":"2026-08-16T03:48:31.391675533Z","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/27ccb68e7cccead5d8c611665a45d23032d468b3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3118e97dae533fb45964b87bbed1801afcff7c65"},{"type":"WEB","url":"https://git.kernel.org/stable/c/388ccffbd2e7e5e4271f291085a7451865705305"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7d139dec96691cde96cb40ed293e2d13d994fb4f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/99ae3248b33df94201915d9c32e7470cdf08cfcd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c0ea1aedb37bb979e864ed7787975434bbd9db73"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c5a0ae895432596b2f464172da8218e2d84e2932"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cb41b308e9d867725d965b291dd085028e36a480"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72061.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72061"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-16T03:48:31.391675533Z"}}