{"id":"CVE-2026-72061","title":"net: sit: require CAP_NET_ADMIN in the device netns for changelink","summary":"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. The…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < cb41b308e9d867725d965b291dd085028e36a480","Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < c5a0ae895432596b2f464172da8218e2d84e2932","Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 7d139dec96691cde96cb40ed293e2d13d994fb4f","Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 388ccffbd2e7e5e4271f291085a7451865705305","Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < c0ea1aedb37bb979e864ed7787975434bbd9db73","Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 3118e97dae533fb45964b87bbed1801afcff7c65","Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 99ae3248b33df94201915d9c32e7470cdf08cfcd","Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 27ccb68e7cccead5d8c611665a45d23032d468b3","Linux 3.11"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:51:08.793068Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:53:18.844Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72061","references":[{"url":"https://git.kernel.org/stable/c/cb41b308e9d867725d965b291dd085028e36a480"},{"url":"https://git.kernel.org/stable/c/c5a0ae895432596b2f464172da8218e2d84e2932"},{"url":"https://git.kernel.org/stable/c/7d139dec96691cde96cb40ed293e2d13d994fb4f"},{"url":"https://git.kernel.org/stable/c/388ccffbd2e7e5e4271f291085a7451865705305"},{"url":"https://git.kernel.org/stable/c/c0ea1aedb37bb979e864ed7787975434bbd9db73"},{"url":"https://git.kernel.org/stable/c/3118e97dae533fb45964b87bbed1801afcff7c65"},{"url":"https://git.kernel.org/stable/c/99ae3248b33df94201915d9c32e7470cdf08cfcd"},{"url":"https://git.kernel.org/stable/c/27ccb68e7cccead5d8c611665a45d23032d468b3"}],"tags":["cve.org"],"epss":0.00176,"epssPercentile":0.0668,"ingestedAt":"2026-10-16T17:24:46.875Z","slug":"CVE-2026-72061","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < cb41b308e9d867725d965b291dd085028e36a480`\n- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < c5a0ae895432596b2f464172da8218e2d84e2932`\n- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 7d139dec96691cde96cb40ed293e2d13d994fb4f`\n- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 388ccffbd2e7e5e4271f291085a7451865705305`\n- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < c0ea1aedb37bb979e864ed7787975434bbd9db73`\n- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 3118e97dae533fb45964b87bbed1801afcff7c65`\n- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 99ae3248b33df94201915d9c32e7470cdf08cfcd`\n- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 27ccb68e7cccead5d8c611665a45d23032d468b3`\n- `Linux 3.11`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}