{"api_version":"1","generated_at":"2026-07-23T21:34:51+00:00","cve":"CVE-2026-63914","urls":{"html":"https://cve.report/CVE-2026-63914","api":"https://cve.report/api/cve/CVE-2026-63914.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63914","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63914"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:09","updated_at":"2026-07-20 15:16:55"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.3","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L","baseScore":7.3,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.3","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L","data":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126","name":"https://git.kernel.org/stable/c/26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/448bb92ca101dde8a6e88b4dc824044b4e341604","name":"https://git.kernel.org/stable/c/448bb92ca101dde8a6e88b4dc824044b4e341604","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6df8157547347b5257bf640a0ae3dfc4411e06cd","name":"https://git.kernel.org/stable/c/6df8157547347b5257bf640a0ae3dfc4411e06cd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4","name":"https://git.kernel.org/stable/c/7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fe463798343382c8fe9416a95959f005a3c30aa5","name":"https://git.kernel.org/stable/c/fe463798343382c8fe9416a95959f005a3c30aa5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad","name":"https://git.kernel.org/stable/c/bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/00f2c451e57df50b1151d9b2254878f106b7c892","name":"https://git.kernel.org/stable/c/00f2c451e57df50b1151d9b2254878f106b7c892","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a306cf2ac8849c487791369fad6f216399d000f6","name":"https://git.kernel.org/stable/c/a306cf2ac8849c487791369fad6f216399d000f6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63914","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63914","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5c79de6e79cd8ecfbae28886be3ee49044f3a4d4 bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5c79de6e79cd8ecfbae28886be3ee49044f3a4d4 6df8157547347b5257bf640a0ae3dfc4411e06cd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5c79de6e79cd8ecfbae28886be3ee49044f3a4d4 fe463798343382c8fe9416a95959f005a3c30aa5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5c79de6e79cd8ecfbae28886be3ee49044f3a4d4 00f2c451e57df50b1151d9b2254878f106b7c892 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.210 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.176 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.143 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.93 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"63914","cve":"CVE-2026-63914","epss":"0.002100000","percentile":"0.113670000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/xfrm.h","net/key/af_key.c","net/xfrm/xfrm_policy.c","net/xfrm/xfrm_state.c","net/xfrm/xfrm_user.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad","status":"affected","version":"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4","versionType":"git"},{"lessThan":"6df8157547347b5257bf640a0ae3dfc4411e06cd","status":"affected","version":"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4","versionType":"git"},{"lessThan":"fe463798343382c8fe9416a95959f005a3c30aa5","status":"affected","version":"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4","versionType":"git"},{"lessThan":"00f2c451e57df50b1151d9b2254878f106b7c892","status":"affected","version":"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4","versionType":"git"},{"lessThan":"a306cf2ac8849c487791369fad6f216399d000f6","status":"affected","version":"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4","versionType":"git"},{"lessThan":"448bb92ca101dde8a6e88b4dc824044b4e341604","status":"affected","version":"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4","versionType":"git"},{"lessThan":"26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126","status":"affected","version":"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4","versionType":"git"},{"lessThan":"7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4","status":"affected","version":"5c79de6e79cd8ecfbae28886be3ee49044f3a4d4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["include/net/xfrm.h","net/key/af_key.c","net/xfrm/xfrm_policy.c","net/xfrm/xfrm_state.c","net/xfrm/xfrm_user.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.21"},{"lessThan":"2.6.21","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.259","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.210","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.176","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.93","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.35","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.12","versionStartIncluding":"2.6.21","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"2.6.21","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-20T13:41:24.004Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad"},{"url":"https://git.kernel.org/stable/c/6df8157547347b5257bf640a0ae3dfc4411e06cd"},{"url":"https://git.kernel.org/stable/c/fe463798343382c8fe9416a95959f005a3c30aa5"},{"url":"https://git.kernel.org/stable/c/00f2c451e57df50b1151d9b2254878f106b7c892"},{"url":"https://git.kernel.org/stable/c/a306cf2ac8849c487791369fad6f216399d000f6"},{"url":"https://git.kernel.org/stable/c/448bb92ca101dde8a6e88b4dc824044b4e341604"},{"url":"https://git.kernel.org/stable/c/26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126"},{"url":"https://git.kernel.org/stable/c/7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4"}],"title":"xfrm: route MIGRATE notifications to caller's netns","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63914","datePublished":"2026-07-19T14:55:18.618Z","dateReserved":"2026-07-19T07:54:57.020Z","dateUpdated":"2026-07-20T13:41:24.004Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:09","lastModifiedDate":"2026-07-20 15:16:55","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L","baseScore":7.3,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":2,"impactScore":4.7}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63914","Ordinal":"1","Title":"xfrm: route MIGRATE notifications to caller's netns","CVE":"CVE-2026-63914","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63914","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"xfrm: route MIGRATE notifications to caller's netns"}]}}}