{"id":"CVE-2026-68142","revision":"6006fd6fda5b4a4bb71129103baa5697","records":[{"revision":"6006fd6fda5b4a4bb71129103baa5697","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68142","aliases":[],"title":"geneve: require CAP_NET_ADMIN in the device netns for changelink","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngeneve: require CAP_NET_ADMIN in the device netns for changelink\n\nA tunnel changelink() operates on at most two netns, dev_net(dev) and\nthe sticky underlay netns geneve->net. They differ once the device is\ncreated in or moved to a netns other than the one the request runs in.\nThe rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev),\nso a caller privileged there but not in geneve->net can rewrite a geneve\ndevice whose underlay lives in geneve->net.\n\ngeneve_changelink() applies the new configuration against geneve->net:\ngeneve_link_config() and the geneve_quiesce()/geneve_unquiesce() pair\nreopen the underlay sockets in that netns (geneve_sock_add() uses\ngeneve->net), so the same reasoning as the tunnel changelink series\napplies here.\n\nGate geneve_changelink() with rtnl_dev_link_net_capable(), at the top of\nthe op before any attribute is parsed, matching ipgre_changelink() and\nthe rest of the \"require CAP_NET_ADMIN in the device netns for\nchangelink\" series.\n\nFound by 0sec automated security-research tooling (https://0sec.ai).","state":0,"publishedAt":"2026-08-10T11:59:06.048+00:00","modifiedAt":"2026-10-19T20:58:53.417+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                        \"drivers/net/geneve.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5b861f6baa3a22a48d7a4ad0ce38a223d36c978a\",\n                            \"lessThan\": \"a5522963c57f12df5f9db804ebfc472b58eef0ae\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5b861f6baa3a22a48d7a4ad0ce38a223d36c978a\",\n                            \"lessThan\": \"278c6a31ee27c931c722202c8c06cc3253923254\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5b861f6baa3a22a48d7a4ad0ce38a223d36c978a\",\n                            \"lessThan\": \"11a7d989d00160481a273eb4f7f05f64b5a6ffdf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5b861f6baa3a22a48d7a4ad0ce38a223d36c978a\",\n                            \"lessThan\": \"2abdacc927c92fa6a9cc8341e8c9b88dcb561553\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5b861f6baa3a22a48d7a4ad0ce38a223d36c978a\",\n                            \"lessThan\": \"9de5518fc1fab583526a8f66b8e505c4864dc60a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5b861f6baa3a22a48d7a4ad0ce38a223d36c978a\",\n                            \"lessThan\": \"f8c498585d2a08aa623748353c3e61467b7e9fd2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5b861f6baa3a22a48d7a4ad0ce38a223d36c978a\",\n                            \"lessThan\": \"95f45e20f1b2cec13823f0f68060ab4b2261b2c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5b861f6baa3a22a48d7a4ad0ce38a223d36c978a\",\n                            \"lessThan\": \"8efb8f8bbb353b8f2fdf4f37534c6d96c9f69e01\",\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                        \"drivers/net/geneve.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.14\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.14\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.148\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.101\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.42\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.6\",\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:C/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a5522963c57f12df5f9db804ebfc472b58eef0ae","https://git.kernel.org/stable/c/278c6a31ee27c931c722202c8c06cc3253923254","https://git.kernel.org/stable/c/11a7d989d00160481a273eb4f7f05f64b5a6ffdf","https://git.kernel.org/stable/c/2abdacc927c92fa6a9cc8341e8c9b88dcb561553","https://git.kernel.org/stable/c/9de5518fc1fab583526a8f66b8e505c4864dc60a","https://git.kernel.org/stable/c/f8c498585d2a08aa623748353c3e61467b7e9fd2","https://git.kernel.org/stable/c/95f45e20f1b2cec13823f0f68060ab4b2261b2c1","https://git.kernel.org/stable/c/8efb8f8bbb353b8f2fdf4f37534c6d96c9f69e01"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68142","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68142","identifiers":["CVE-2026-68142"]},"retained":false,"historicalAffected":[]}],"coverage":[]}