{"id":"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-\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 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.","modified":"2026-08-18T03:56:20.119176230Z","published":"2026-08-15T05:52:15.823Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72061.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5e6700b3bf98fe98d630bf9c939ad4c85ce95592"},{"fixed":"cb41b308e9d867725d965b291dd085028e36a480"},{"fixed":"c5a0ae895432596b2f464172da8218e2d84e2932"},{"fixed":"7d139dec96691cde96cb40ed293e2d13d994fb4f"},{"fixed":"388ccffbd2e7e5e4271f291085a7451865705305"},{"fixed":"c0ea1aedb37bb979e864ed7787975434bbd9db73"},{"fixed":"3118e97dae533fb45964b87bbed1801afcff7c65"},{"fixed":"99ae3248b33df94201915d9c32e7470cdf08cfcd"},{"fixed":"27ccb68e7cccead5d8c611665a45d23032d468b3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72061.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.11.0"},{"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-2026-72061.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"}]}