{"api_version":"1","generated_at":"2026-10-13T23:13:11+00:00","cve":"CVE-2026-98370","urls":{"html":"https://cve.report/CVE-2026-98370","api":"https://cve.report/api/cve/CVE-2026-98370.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98370","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98370"},"summary":{"title":"xfrm: fix compat ALLOCSPI request use-after-free","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix compat ALLOCSPI request use-after-free\n\nxfrm_state_netlink() builds the ALLOCSPI response with\ndump_one_state(), which already calls alloc_compat() with the response\nskb and header.\n\nxfrm_alloc_userspi() then calls alloc_compat() again, but passes the\noriginal request skb and its header. For a compat request, the\ntranslator therefore interprets the 228-byte compat xfrm_userspi_info\nas the 232-byte native layout and reads four bytes past the declared\npayload. It also publishes the translated child through the request's\nfrag_list.\n\nA multicast clone of the request shares skb_shared_info and can observe\nthat child. xfrm_user_rcv_msg() frees it after the request handler\nreturns, racing a compat receiver which may still be copying from it and\nresulting in a use-after-free.\n\nRemove the redundant conversion. The response keeps its correct compat\ntranslation from dump_one_state(), and no child is attached to the\ninbound request.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-06 09:18:31","updated_at":"2026-10-06 09:18:31"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/bb63ab52a18273ec68340ac49aebbaa7b514ccd5","name":"https://git.kernel.org/stable/c/bb63ab52a18273ec68340ac49aebbaa7b514ccd5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/42971ea17c7a8afc0bdd5ca40648bf4e5bb7b810","name":"https://git.kernel.org/stable/c/42971ea17c7a8afc0bdd5ca40648bf4e5bb7b810","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/494f2bee9d8d0ebcfa249ac41bed7fed26d119b4","name":"https://git.kernel.org/stable/c/494f2bee9d8d0ebcfa249ac41bed7fed26d119b4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/17893987e52918c23945c42e47e894a936305a25","name":"https://git.kernel.org/stable/c/17893987e52918c23945c42e47e894a936305a25","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/248433942155b42a0ef04a5806c8aca024ea7c33","name":"https://git.kernel.org/stable/c/248433942155b42a0ef04a5806c8aca024ea7c33","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e70f639aee2ff0def155c256cace9e0f81d998e2","name":"https://git.kernel.org/stable/c/e70f639aee2ff0def155c256cace9e0f81d998e2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2b63341e2ebc9b6f73cbd9214dbe7d46dd98c718","name":"https://git.kernel.org/stable/c/2b63341e2ebc9b6f73cbd9214dbe7d46dd98c718","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d1ebd9081879fd9ae9c8fb7e8928f19cc88ae320","name":"https://git.kernel.org/stable/c/d1ebd9081879fd9ae9c8fb7e8928f19cc88ae320","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98370","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98370","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 494f2bee9d8d0ebcfa249ac41bed7fed26d119b4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 17893987e52918c23945c42e47e894a936305a25 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 42971ea17c7a8afc0bdd5ca40648bf4e5bb7b810 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 2b63341e2ebc9b6f73cbd9214dbe7d46dd98c718 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98370","cve":"CVE-2026-98370","epss":"0.001720000","percentile":"0.059360000","score_date":"2026-10-06","updated_at":"2026-10-07 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the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix compat ALLOCSPI request use-after-free\n\nxfrm_state_netlink() builds the ALLOCSPI response with\ndump_one_state(), which already calls alloc_compat() with the response\nskb and header.\n\nxfrm_alloc_userspi() then calls alloc_compat() again, but passes the\noriginal request skb and its header. For a compat request, the\ntranslator therefore interprets the 228-byte compat xfrm_userspi_info\nas the 232-byte native layout and reads four bytes past the declared\npayload. It also publishes the translated child through the request's\nfrag_list.\n\nA multicast clone of the request shares skb_shared_info and can observe\nthat child. xfrm_user_rcv_msg() frees it after the request handler\nreturns, racing a compat receiver which may still be copying from it and\nresulting in a use-after-free.\n\nRemove the redundant conversion. The response keeps its correct compat\ntranslation from dump_one_state(), and no child is attached to the\ninbound request."}],"providerMetadata":{"dateUpdated":"2026-10-06T08:46:54.981Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/494f2bee9d8d0ebcfa249ac41bed7fed26d119b4"},{"url":"https://git.kernel.org/stable/c/17893987e52918c23945c42e47e894a936305a25"},{"url":"https://git.kernel.org/stable/c/42971ea17c7a8afc0bdd5ca40648bf4e5bb7b810"},{"url":"https://git.kernel.org/stable/c/2b63341e2ebc9b6f73cbd9214dbe7d46dd98c718"},{"url":"https://git.kernel.org/stable/c/bb63ab52a18273ec68340ac49aebbaa7b514ccd5"},{"url":"https://git.kernel.org/stable/c/248433942155b42a0ef04a5806c8aca024ea7c33"},{"url":"https://git.kernel.org/stable/c/e70f639aee2ff0def155c256cace9e0f81d998e2"},{"url":"https://git.kernel.org/stable/c/d1ebd9081879fd9ae9c8fb7e8928f19cc88ae320"}],"title":"xfrm: fix compat ALLOCSPI request use-after-free","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98370","datePublished":"2026-10-06T08:46:54.981Z","dateReserved":"2026-09-25T10:25:14.344Z","dateUpdated":"2026-10-06T08:46:54.981Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 09:18:31","lastModifiedDate":"2026-10-06 09:18:31","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98370","Ordinal":"1","Title":"xfrm: fix compat ALLOCSPI request use-after-free","CVE":"CVE-2026-98370","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98370","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix compat ALLOCSPI request use-after-free\n\nxfrm_state_netlink() builds the ALLOCSPI response with\ndump_one_state(), which already calls alloc_compat() with the response\nskb and header.\n\nxfrm_alloc_userspi() then calls alloc_compat() again, but passes the\noriginal request skb and its header. For a compat request, the\ntranslator therefore interprets the 228-byte compat xfrm_userspi_info\nas the 232-byte native layout and reads four bytes past the declared\npayload. It also publishes the translated child through the request's\nfrag_list.\n\nA multicast clone of the request shares skb_shared_info and can observe\nthat child. xfrm_user_rcv_msg() frees it after the request handler\nreturns, racing a compat receiver which may still be copying from it and\nresulting in a use-after-free.\n\nRemove the redundant conversion. The response keeps its correct compat\ntranslation from dump_one_state(), and no child is attached to the\ninbound request.","Type":"Description","Title":"xfrm: fix compat ALLOCSPI request use-after-free"}]}}}