{"metadata": {"vulnerability": "CVE-2026-99191", "count": 20, "kinds": {"milestone": 7, "sighting": 1, "kev": 0, "other": 12}}, "data": [{"timestamp": "2026-09-25T10:25:14.400Z", "date_only": false, "value": "2026-09-25T10:25:14.400Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-99191", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-28T00:00:00Z", "date_only": false, "value": "2026-10-28T00:00:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99191", "record": "UBUNTU-CVE-2026-99191", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-28T10:35:47.854Z", "date_only": false, "value": "2026-10-28T10:35:47.854Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-99191", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-28T11:17:40Z", "date_only": false, "value": "2026-10-28T11:17:40Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-4QQV-FGH9-MG86", "record": "GHSA-4QQV-FGH9-MG86", "field": "database_specific.nvd_published_at", "linked_record": true}, {"timestamp": "2026-10-28T11:17:40.080Z", "date_only": false, "value": "2026-10-28T11:17:40.080", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-99191", "record": "FKIE_CVE-2026-99191", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-28T11:45:08.509Z", "date_only": false, "value": "2026-10-28T11:45:08.509373Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117518362722319662", "record": "CVE-2026-99191", "field": "creation_timestamp", "uuid": "77c6d62d-086d-4a77-be8e-a4ac188a4a16", "content": "CVE-2026-99191 calipso: keep BIG TCP payload_len in calipso_skbuff_setattr() In the Linux kernel, the following vulnerability has been resolved:\ncalipso: keep BIG TCP payload_len in calipso_skbuff_setattr()\ncalipso_skbuff_setattr() adjusts payload_len by the length of theoption it inserts or resizes:\n\tpayload = ntohs(ip6_hdr->payload_len);\tip6_hdr->payload_len = htons(payload + len_delta);\nGRO can build BIG TCP packets larger than IPV6_MAXPLEN, and storespayload_len == 0 for them; ipv6_payload_len() then falls back toskb->len.  For such a packet forwarded to a destination mapped toCALIPSO, the code above writes len_delta (or 65536 + len_delta whenshrinking) into payload_len, and ipv6_payload_len() no longer fallsback to skb->len.  nf_tables, conntrack and sch_cake rely on it.\nThe same arithmetic also wraps when a packet grows past IPV6_MAXPLEN,and a BIG TCP packet that shrinks below IPV6_MAXPLEN should get itsreal length back.\nSet payload_len from the skb length with ipv6_set_payload_len(), whichstores 0 above IPV6_MAXPLEN and the real length otherwise, asipv6_gro_complete() does.  The network header was just reset toskb->data, so skb->len - sizeof(*ip6_hdr) is the payload length.\nTested on one kernel (arm64, QEMU) with SELinux permissive, a minimalmdp-generated policy (network_peer_controls=1), \"netlabelctl calipsoadd pass doi:16\" and a NetLabel mapping of fd00:2::/64 to CALIPSODOI 16.  calipso_skbuff_setattr() was called throughnetlbl_skbuff_setattr() from a test-only debugfs hook (not part ofthis patch) adding a level-only label; payload_len after the call:\n  case                         before fix   after fix   real length  1000, unlabeled                    1016        1016          1016  70000 GSO, payload_len 0             16           0         70016  65530 GSO, grows past MAXPLEN        10           0         65546  65540 GSO with a 24 byte hop  header, shrinks below MAXPLEN     65528       65532         65532  1000 with a 24 byte hop header      992         992           992\n(0 means ipv6_payload_len() returns the real length.)  On the forwardpath, with a client injecting unlabeled UDP through a router to aserver, the router adds the CALIPSO option and the server delivers alldatagrams (Udp6InDatagrams 5, Ip6InTruncatedPkts 0) with this patch.\nhttps://www.cve.org/CVERecord?id=CVE-2026-99191https://git.kernel.org/stable/c/1c9fcfca51e3c5cd46dd72a4da74d56eff183513https://git.kernel.org/stable/c/8ee0e03663826a76507048d58466b29321a57656https://git.kernel.org/stable/c/8070ed578b6b9134e045627fb745c887a806d46e#kernel #Linux#CVE_2026_99191#bot", "url": "https://infosec.exchange/users/cve/statuses/117518362722319662"}, {"timestamp": "2026-10-28T12:31:07Z", "date_only": false, "value": "2026-10-28T12:31:07Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-4QQV-FGH9-MG86", "record": "GHSA-4QQV-FGH9-MG86", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-29T01:08:13Z", "date_only": false, "value": "2026-10-29T01:08:13.000Z", "kind": "other", "label": "Advisory revision", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-99191", "record": "MSRC_CVE-2026-99191", "field": "document.tracking.revision_history.0.date", "linked_record": true}, {"timestamp": "2026-10-29T01:08:13Z", "date_only": false, "value": "2026-10-29T01:08:13.000Z", "kind": "other", "label": "None available", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-99191", "record": "MSRC_CVE-2026-99191", "field": "vulnerabilities.0.remediations.0.date", "linked_record": true}, {"timestamp": "2026-10-29T01:08:13Z", "date_only": false, "value": "2026-10-29T01:08:13.000Z", "kind": "milestone", "label": "Published", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-99191", "record": "MSRC_CVE-2026-99191", "field": "document.tracking.initial_release_date", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-30T06:08:48.155Z", "date_only": false, "value": "2026-10-30T06:08:48.155407Z", "kind": "milestone", "label": "Published", "source": "osv_bellsoft \u00b7 BELL-CVE-2026-99191", "record": "BELL-CVE-2026-99191", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-30T06:30:46Z", "date_only": false, "value": "2026-10-30T06:30:46Z", "kind": "other", "label": "Updated", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99191", "record": "UBUNTU-CVE-2026-99191", "field": "modified", "linked_record": true}, {"timestamp": "2026-10-30T12:42:48.993Z", "date_only": false, "value": "2026-10-30T12:42:48.993Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-99191", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-10-30T12:42:48.993Z", "date_only": false, "value": "2026-10-30T12:42:48.993Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / Linux", "record": "CVE-2026-99191", "field": 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