{"id":"CVE-2026-72136","title":"xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink\n\nxfrmi_changelink() operates on at most two netns, dev_net(dev) and the\ninterface link ne…","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 >= f203b76d78092faf248db3f851840fbecf80b40e < 04c1aa57d08471b1953bf27c84ac9b3d78d71831","Linux >= f203b76d78092faf248db3f851840fbecf80b40e < bdfd1c21d90e628a58a9de79e024cdfcbedfa15c","Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 80ec68bba11f7f387c0e4099c2d7b2c84943eb99","Linux >= f203b76d78092faf248db3f851840fbecf80b40e < e9c90756f10da334fb31552e52c61f1dba69f491","Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 37b61946d278c7deb0d40ba8f2b6fc0478d61dab","Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 8ca2a19a987a7d1cb4c916ed9723a1c6993b4276","Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea","Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 095515d89b19b6cc19dfcdc846f97403ed1ebce3","Linux 4.19"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:42:42.776069Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:44:58.796Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72136","references":[{"url":"https://git.kernel.org/stable/c/04c1aa57d08471b1953bf27c84ac9b3d78d71831"},{"url":"https://git.kernel.org/stable/c/bdfd1c21d90e628a58a9de79e024cdfcbedfa15c"},{"url":"https://git.kernel.org/stable/c/80ec68bba11f7f387c0e4099c2d7b2c84943eb99"},{"url":"https://git.kernel.org/stable/c/e9c90756f10da334fb31552e52c61f1dba69f491"},{"url":"https://git.kernel.org/stable/c/37b61946d278c7deb0d40ba8f2b6fc0478d61dab"},{"url":"https://git.kernel.org/stable/c/8ca2a19a987a7d1cb4c916ed9723a1c6993b4276"},{"url":"https://git.kernel.org/stable/c/3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea"},{"url":"https://git.kernel.org/stable/c/095515d89b19b6cc19dfcdc846f97403ed1ebce3"}],"tags":["cve.org"],"epss":0.00169,"epssPercentile":0.05787,"ingestedAt":"2026-10-16T19:46:24.427Z","slug":"CVE-2026-72136","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink\n\nxfrmi_changelink() operates on at most two netns, dev_net(dev) and the\ninterface link netns xi->net. They differ once the device is created in\nor moved 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 xi->net can rewrite an interface that\nlives in xi->net.\n\nGate xfrmi_changelink() on rtnl_dev_link_net_capable() at its top,\nbefore any attribute is parsed.\n\n## Affected\n\n- `Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 04c1aa57d08471b1953bf27c84ac9b3d78d71831`\n- `Linux >= f203b76d78092faf248db3f851840fbecf80b40e < bdfd1c21d90e628a58a9de79e024cdfcbedfa15c`\n- `Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 80ec68bba11f7f387c0e4099c2d7b2c84943eb99`\n- `Linux >= f203b76d78092faf248db3f851840fbecf80b40e < e9c90756f10da334fb31552e52c61f1dba69f491`\n- `Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 37b61946d278c7deb0d40ba8f2b6fc0478d61dab`\n- `Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 8ca2a19a987a7d1cb4c916ed9723a1c6993b4276`\n- `Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea`\n- `Linux >= f203b76d78092faf248db3f851840fbecf80b40e < 095515d89b19b6cc19dfcdc846f97403ed1ebce3`\n- `Linux 4.19`\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":[]}