{"id":"CVE-2026-74283","revision":"e06d7e8ed617445cac445259679c70ba","records":[{"revision":"e06d7e8ed617445cac445259679c70ba","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74283","aliases":[],"title":"tipc: require net admin for TIPCv2 netlink mutators","description":"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 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.","state":0,"publishedAt":"2026-08-15T05:57:52.667+00:00","modifiedAt":"2026-10-16T18:55:30.055+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/tipc/netlink.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0655f6a8635b1b66f2434d5556b1044c14b1ccaf\",\n                            \"lessThan\": \"b06fb5f78a9af0929aaa47c92d0b7bca0617fb25\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0655f6a8635b1b66f2434d5556b1044c14b1ccaf\",\n                            \"lessThan\": \"52864c6c13dcc292481eabfeb3c31a86c3ec06f2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0655f6a8635b1b66f2434d5556b1044c14b1ccaf\",\n                            \"lessThan\": \"e87dcc1a644d087de0bb6c94c6dd28c29b89597f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0655f6a8635b1b66f2434d5556b1044c14b1ccaf\",\n                            \"lessThan\": \"9b937de4b3ded62a24da6e8d9d623cdb2748fa74\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0655f6a8635b1b66f2434d5556b1044c14b1ccaf\",\n                            \"lessThan\": \"c9668a4adb2264625daeeabc7466b783badd4614\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0655f6a8635b1b66f2434d5556b1044c14b1ccaf\",\n                            \"lessThan\": \"cebaefe1aceb650d5c99a4c0e1a4dde09e211818\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0655f6a8635b1b66f2434d5556b1044c14b1ccaf\",\n                            \"lessThan\": \"56f0a2e0a1d004e025cd031c3a801ab73959269f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0655f6a8635b1b66f2434d5556b1044c14b1ccaf\",\n                            \"lessThan\": \"86b0c540e2ea397cde021eecd24145f7c16a3d4e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/tipc/netlink.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.261\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/b06fb5f78a9af0929aaa47c92d0b7bca0617fb25","https://git.kernel.org/stable/c/52864c6c13dcc292481eabfeb3c31a86c3ec06f2","https://git.kernel.org/stable/c/e87dcc1a644d087de0bb6c94c6dd28c29b89597f","https://git.kernel.org/stable/c/9b937de4b3ded62a24da6e8d9d623cdb2748fa74","https://git.kernel.org/stable/c/c9668a4adb2264625daeeabc7466b783badd4614","https://git.kernel.org/stable/c/cebaefe1aceb650d5c99a4c0e1a4dde09e211818","https://git.kernel.org/stable/c/56f0a2e0a1d004e025cd031c3a801ab73959269f","https://git.kernel.org/stable/c/86b0c540e2ea397cde021eecd24145f7c16a3d4e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74283","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74283","identifiers":["CVE-2026-74283"]},"retained":false,"historicalAffected":[]}],"coverage":[]}