{"id":"CVE-2026-63914","revision":"232a49278e0b41f688de21edf5f1e8fe","records":[{"revision":"232a49278e0b41f688de21edf5f1e8fe","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63914","aliases":[],"title":"xfrm: route MIGRATE notifications to caller's netns","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: route MIGRATE notifications to caller's netns\n\nxfrm_send_migrate() in net/xfrm/xfrm_user.c and pfkey_send_migrate()\nin net/key/af_key.c both hardcode &init_net for the multicast that\nannounces a successful XFRM_MSG_MIGRATE / SADB_X_MIGRATE.\n\nXFRM_MSG_MIGRATE arrives on a per-netns NETLINK_XFRM socket, and the\nrest of the xfrm/af_key netlink path was made netns-aware in 2008.\nThe other 14 multicast paths in xfrm_user.c route their event using\nxs_net(x), xp_net(xp) or sock_net(skb->sk); only the migrate path\nwas missed.\n\nTwo consequences of the init_net hardcoding:\n\n  1. The notification (selector, old/new endpoint addresses, and the\n     km_address) is delivered to listeners on init_net's\n     XFRMNLGRP_MIGRATE / pfkey BROADCAST_ALL groups rather than on\n     the issuing netns. An IKE daemon running in init_net therefore\n     receives migration notifications originating from any other\n     netns on the host.\n\n  2. An IKE daemon running inside a non-init netns and subscribed\n     to its own XFRMNLGRP_MIGRATE / pfkey groups never receives the\n     notification of its own migration. IKEv2 MOBIKE / address-update\n     handling inside a netns is silently broken.\n\nThread struct net through km_migrate() and the xfrm_mgr.migrate\nfunction pointer, drop the &init_net override in xfrm_send_migrate()\nand pfkey_send_migrate(), and pass the caller's net (already in\nscope in xfrm_migrate() via sock_net(skb->sk)) all the way down.\nstruct xfrm_mgr is in-tree only and not exported as a stable API,\nso the function-pointer signature change is internal.\n\npfkey_broadcast() is already netns-aware via net_generic(net,\npfkey_net_id) since the pernet conversion. The five other\npfkey_broadcast() callers in af_key.c already pass xs_net(x),\nsock_net(sk) or a per-netns net, so this only removes the\n&init_net outlier.","state":0,"publishedAt":"2026-07-19T14:55:18.618+00:00","modifiedAt":"2026-10-19T20:17:55.631+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                        \"include/net/xfrm.h\",\n                        \"net/key/af_key.c\",\n                        \"net/xfrm/xfrm_policy.c\",\n                        \"net/xfrm/xfrm_state.c\",\n                        \"net/xfrm/xfrm_user.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4\",\n                            \"lessThan\": \"bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4\",\n                            \"lessThan\": \"6df8157547347b5257bf640a0ae3dfc4411e06cd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4\",\n                            \"lessThan\": \"fe463798343382c8fe9416a95959f005a3c30aa5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4\",\n                            \"lessThan\": \"00f2c451e57df50b1151d9b2254878f106b7c892\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4\",\n                            \"lessThan\": \"a306cf2ac8849c487791369fad6f216399d000f6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4\",\n                            \"lessThan\": \"448bb92ca101dde8a6e88b4dc824044b4e341604\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4\",\n                            \"lessThan\": \"26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4\",\n                            \"lessThan\": \"7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4\",\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                        \"include/net/xfrm.h\",\n                        \"net/key/af_key.c\",\n                        \"net/xfrm/xfrm_policy.c\",\n                        \"net/xfrm/xfrm_state.c\",\n                        \"net/xfrm/xfrm_user.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.21\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.21\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.259\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.210\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.176\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.143\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.93\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.35\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.12\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\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:N/A:L","score":7.3,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad","https://git.kernel.org/stable/c/6df8157547347b5257bf640a0ae3dfc4411e06cd","https://git.kernel.org/stable/c/fe463798343382c8fe9416a95959f005a3c30aa5","https://git.kernel.org/stable/c/00f2c451e57df50b1151d9b2254878f106b7c892","https://git.kernel.org/stable/c/a306cf2ac8849c487791369fad6f216399d000f6","https://git.kernel.org/stable/c/448bb92ca101dde8a6e88b4dc824044b4e341604","https://git.kernel.org/stable/c/26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126","https://git.kernel.org/stable/c/7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63914","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63914","identifiers":["CVE-2026-63914"]},"retained":false,"historicalAffected":[]}],"coverage":[]}