{"id":"CVE-2026-98370","title":"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 r…","summary":"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 r…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 < 494f2bee9d8d0ebcfa249ac41bed7fed26d119b4","Linux >= 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 < 17893987e52918c23945c42e47e894a936305a25","Linux >= 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 < 42971ea17c7a8afc0bdd5ca40648bf4e5bb7b810","Linux >= 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 < 2b63341e2ebc9b6f73cbd9214dbe7d46dd98c718","Linux >= 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 < bb63ab52a18273ec68340ac49aebbaa7b514ccd5","Linux >= 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 < 248433942155b42a0ef04a5806c8aca024ea7c33","Linux >= 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 < e70f639aee2ff0def155c256cace9e0f81d998e2","Linux >= 5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3 < d1ebd9081879fd9ae9c8fb7e8928f19cc88ae320","Linux 5.10"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:31.450","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98370","references":[{"url":"https://git.kernel.org/stable/c/17893987e52918c23945c42e47e894a936305a25","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/248433942155b42a0ef04a5806c8aca024ea7c33","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2b63341e2ebc9b6f73cbd9214dbe7d46dd98c718","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/42971ea17c7a8afc0bdd5ca40648bf4e5bb7b810","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/494f2bee9d8d0ebcfa249ac41bed7fed26d119b4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bb63ab52a18273ec68340ac49aebbaa7b514ccd5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d1ebd9081879fd9ae9c8fb7e8928f19cc88ae320","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e70f639aee2ff0def155c256cace9e0f81d998e2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.389Z","slug":"CVE-2026-98370","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}