{"id":"CVE-2026-74283","title":"tipc: require net admin for TIPCv2 netlink mutators","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: require net admin for TIPCv2 netlink mutators\n\nTIPCv2 registers mutating generic-netlink operations without admin\npermission flags. Generic netlink only checks CA…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < b06fb5f78a9af0929aaa47c92d0b7bca0617fb25","Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 52864c6c13dcc292481eabfeb3c31a86c3ec06f2","Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < e87dcc1a644d087de0bb6c94c6dd28c29b89597f","Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 9b937de4b3ded62a24da6e8d9d623cdb2748fa74","Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < c9668a4adb2264625daeeabc7466b783badd4614","Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < cebaefe1aceb650d5c99a4c0e1a4dde09e211818","Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 56f0a2e0a1d004e025cd031c3a801ab73959269f","Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 86b0c540e2ea397cde021eecd24145f7c16a3d4e","Linux 3.19"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:52:09.795417Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:55:30.055Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74283","references":[{"url":"https://git.kernel.org/stable/c/b06fb5f78a9af0929aaa47c92d0b7bca0617fb25"},{"url":"https://git.kernel.org/stable/c/52864c6c13dcc292481eabfeb3c31a86c3ec06f2"},{"url":"https://git.kernel.org/stable/c/e87dcc1a644d087de0bb6c94c6dd28c29b89597f"},{"url":"https://git.kernel.org/stable/c/9b937de4b3ded62a24da6e8d9d623cdb2748fa74"},{"url":"https://git.kernel.org/stable/c/c9668a4adb2264625daeeabc7466b783badd4614"},{"url":"https://git.kernel.org/stable/c/cebaefe1aceb650d5c99a4c0e1a4dde09e211818"},{"url":"https://git.kernel.org/stable/c/56f0a2e0a1d004e025cd031c3a801ab73959269f"},{"url":"https://git.kernel.org/stable/c/86b0c540e2ea397cde021eecd24145f7c16a3d4e"}],"tags":["cve.org"],"epss":0.00169,"epssPercentile":0.0579,"ingestedAt":"2026-10-16T19:46:24.384Z","slug":"CVE-2026-74283","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntipc: require net admin for TIPCv2 netlink mutators\n\nTIPCv2 registers mutating generic-netlink operations without admin\npermission flags. Generic netlink only checks CAP_NET_ADMIN when an\noperation sets GENL_ADMIN_PERM or GENL_UNS_ADMIN_PERM, so a local\nunprivileged process can currently change TIPC state through commands\nsuch as TIPC_NL_NET_SET, TIPC_NL_KEY_SET, TIPC_NL_KEY_FLUSH, and\nbearer enable/disable.\n\nThe legacy TIPC netlink API already checks netlink_net_capable(...,\nCAP_NET_ADMIN) for administrative commands. Give the TIPCv2 mutators\nthe equivalent generic-netlink gate. Use GENL_UNS_ADMIN_PERM, which\nmaps to the same namespace-aware CAP_NET_ADMIN check that\nnetlink_net_capable() performs, so the behaviour matches the legacy\npath and keeps working for CAP_NET_ADMIN holders in a non-initial user\nnamespace (containers).\n\nA QEMU/KASAN repro run as uid/gid 65534 with zero effective\ncapabilities previously succeeded in changing the network id and node\nidentity, setting and flushing key material, and enabling/disabling a\nUDP bearer. With this patch applied the same operations fail with\n-EPERM.\n\n## Affected\n\n- `Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < b06fb5f78a9af0929aaa47c92d0b7bca0617fb25`\n- `Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 52864c6c13dcc292481eabfeb3c31a86c3ec06f2`\n- `Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < e87dcc1a644d087de0bb6c94c6dd28c29b89597f`\n- `Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 9b937de4b3ded62a24da6e8d9d623cdb2748fa74`\n- `Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < c9668a4adb2264625daeeabc7466b783badd4614`\n- `Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < cebaefe1aceb650d5c99a4c0e1a4dde09e211818`\n- `Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 56f0a2e0a1d004e025cd031c3a801ab73959269f`\n- `Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 86b0c540e2ea397cde021eecd24145f7c16a3d4e`\n- `Linux 3.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}