{"metadata": {"vulnerability": "CVE-2026-98432", "count": 15, "kinds": {"milestone": 5, "sighting": 2, "kev": 0, "other": 8}}, "data": [{"timestamp": "2026-09-25T10:25:14.348Z", "date_only": false, "value": "2026-09-25T10:25:14.348Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-98432", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-15T12:08:22.205Z", "date_only": false, "value": "2026-10-15T12:08:22.205Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-98432", "field": "cveMetadata.datePublished"}, {"timestamp": "2026-10-15T12:19:54.582Z", "date_only": false, "value": "2026-10-15T12:19:54.582Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-98432", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-10-15T12:19:54.582Z", "date_only": false, "value": "2026-10-15T12:19:54.582Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / Linux", "record": "CVE-2026-98432", "field": "containers.cna.providerMetadata.dateUpdated"}, {"timestamp": "2026-10-15T12:24:21.763Z", "date_only": false, "value": "2026-10-15T12:24:21.763173Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117444906917745585", "record": "CVE-2026-98432", "field": "creation_timestamp", "uuid": "9eaff49e-77d8-4f9d-952a-d54dc326f74d", "content": "CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period In the Linux kernel, the following vulnerability has been resolved:\nipv4: free inet_opt and ireq_opt after an RCU grace period\ntcp_v4_syn_recv_sock() transfers ownership of ireq->ireq_opt to thechild socket (newinet->inet_opt) without copying it.\nAnother cpu can concurrently process a retransmitted SYN for the samerequest socket, and send a SYNACK from tcp_check_req().tcp_v4_send_synack() and inet_csk_route_req() read ireq->ireq_optunder rcu_read_lock() only, and ip_build_and_send_pkt() andip_options_build() then read opt->optlen twice.\nNote that the SYNACK timer itself is not an issue: it holds areference on its request socket, and inet_csk_reqsk_queue_drop()calls timer_delete_sync() before the child can be freed.\nSince commit 079096f103fa (\"tcp/dccp: install syn_recv requestsinto ehash table\"), request sockets are processed without holdingthe listener lock, so nothing prevents the child socket from beingfreed while the SYNACK is still being built. TCP child sockets donot have SOCK_RCU_FREE, and inet_sock_destruct() frees inet_optwith a plain kfree(), leading to a use-after-free inip_options_build().\nA similar issue exists with request socket migration(net.ipv4.tcp_migrate_req=1, or a BPF_SK_REUSEPORT_SELECT_OR_MIGRATEprogram). reqsk_timer_handler() clones the request socket withinet_reqsk_clone(), so that the old request socket and its cloneshare the same ireq_opt, then reqsk_migrate_reset() clears thepointer in the old one. Another cpu holding a reference on the oldrequest socket can still be using these options (sending a SYNACK,or creating a child in tcp_v4_syn_recv_sock()) when the clone isfreed, and tcp_v4_reqsk_destructor() also uses a plain kfree().\nReaders already use RCU, and other paths replacing inet_opt(do_ip_setsockopt(), cipso_v4_sock_setattr()...) already usekfree_rcu(). Use kfree_rcu() in inet_sock_destruct() andtcp_v4_reqsk_destructor() as well.\nIPv6 is not affected by the first issue, because tcp_v6_syn_recv_sock()duplicates the options. tcp_v6_reqsk_destructor() has the samemigration issue with ipv6_opt, which is only set by CALIPSO. Thiswill be addressed in a separate patch.\nhttps://www.cve.org/CVERecord?id=CVE-2026-98432https://git.kernel.org/stable/c/11a03ce3c4a62d84c10ccdfe47f8075006498568https://git.kernel.org/stable/c/a47406c769f72c070386985488f1c4d057df86b2https://git.kernel.org/stable/c/26d4c36d318cffbbd160884a0e4cec0da4da4936https://git.kernel.org/stable/c/e3f33b0a1d89d738e2b913dab519226eaf76e15b#kernel #Linux#CVE_2026_98432#bot", "url": "https://infosec.exchange/users/cve/statuses/117444906917745585"}, {"timestamp": "2026-10-15T13:17:13Z", "date_only": false, "value": "2026-10-15T13:17:13Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-QP6H-4HVH-QQQC", "record": "GHSA-QP6H-4HVH-QQQC", "field": "database_specific.nvd_published_at"}, {"timestamp": "2026-10-15T13:17:13.987Z", "date_only": false, "value": "2026-10-15T13:17:13.987", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98432", "record": "FKIE_CVE-2026-98432", "field": "published"}, {"timestamp": "2026-10-15T13:17:13.987Z", "date_only": false, "value": "2026-10-15T13:17:13.987", "kind": "other", "label": "Updated", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98432", "record": "FKIE_CVE-2026-98432", "field": "lastModified"}, {"timestamp": "2026-10-15T18:32:33Z", "date_only": false, "value": "2026-10-15T18:32:33Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-QP6H-4HVH-QQQC", "record": "GHSA-QP6H-4HVH-QQQC", "field": "published"}, {"timestamp": "2026-10-15T18:32:33Z", "date_only": false, "value": "2026-10-15T18:32:33Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-QP6H-4HVH-QQQC", "record": "GHSA-QP6H-4HVH-QQQC", "field": "modified"}, {"timestamp": "2026-10-16T01:07:50Z", "date_only": false, "value": "2026-10-16T01:07:50.000Z", "kind": "other", "label": "Advisory revision", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-98432", "record": "MSRC_CVE-2026-98432", "field": "document.tracking.revision_history.0.date"}, {"timestamp": "2026-10-16T01:07:50Z", "date_only": false, "value": "2026-10-16T01:07:50.000Z", "kind": "milestone", "label": "Published", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-98432", "record": "MSRC_CVE-2026-98432", "field": "document.tracking.initial_release_date"}, {"timestamp": "2026-10-16T01:07:50Z", "date_only": false, "value": "2026-10-16T01:07:50.000Z", "kind": "other", "label": "Updated", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-98432", "record": "MSRC_CVE-2026-98432", "field": "document.tracking.current_release_date"}, {"timestamp": "2026-10-16T07:00:53.914Z", "date_only": false, "value": "2026-10-16T07:00:53.914Z", "kind": "other", "label": "Document generated", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-98432", "record": "MSRC_CVE-2026-98432", "field": "document.tracking.generator.date"}, {"timestamp": "2026-10-16T12:35:02.892Z", "date_only": false, "value": "2026-10-16T12:35:02.892156Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/vuldb/statuses/117450611253474616", "record": "CVE-2026-98432", "field": "creation_timestamp", "uuid": "25327609-577d-4352-a5ab-86fb8ecbb472", "content": "\ud83d\udea8 Attention, elevated activities detected targeting Linux Kernel (CVE-2026-98432) https://vuldb.com/vuln/420618/cti", "url": "https://infosec.exchange/users/vuldb/statuses/117450611253474616"}]}