{"metadata": {"vulnerability": "CVE-2026-98401", "count": 26, "kinds": {"milestone": 8, "sighting": 1, "kev": 0, "other": 17}}, "data": [{"timestamp": "2026-09-25T10:25:14.346Z", "date_only": false, "value": "2026-09-25T10:25:14.346Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-98401", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-14T00:00:00Z", "date_only": false, "value": "2026-10-14T00:00:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-98401", "record": "UBUNTU-CVE-2026-98401", "field": "published"}, {"timestamp": "2026-10-14T13:26:01.712Z", "date_only": false, "value": "2026-10-14T13:26:01.712Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-98401", "field": "cveMetadata.datePublished"}, {"timestamp": "2026-10-14T14:17:51Z", "date_only": false, "value": "2026-10-14T14:17:51Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-C6HW-23WQ-XX46", "record": "GHSA-C6HW-23WQ-XX46", "field": "database_specific.nvd_published_at"}, {"timestamp": "2026-10-14T14:17:51.120Z", "date_only": false, "value": "2026-10-14T14:17:51.120", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-98401", "record": "FKIE_CVE-2026-98401", "field": "published"}, {"timestamp": "2026-10-14T15:32:19Z", "date_only": false, "value": "2026-10-14T15:32:19Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-C6HW-23WQ-XX46", "record": "GHSA-C6HW-23WQ-XX46", "field": "published"}, {"timestamp": "2026-10-14T15:32:19Z", "date_only": false, "value": "2026-10-14T15:32:19Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-C6HW-23WQ-XX46", "record": "GHSA-C6HW-23WQ-XX46", "field": "modified"}, {"timestamp": "2026-10-14T18:32:49.639Z", "date_only": false, "value": "2026-10-14T18:32:49.639915Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117440693458756497", "record": "CVE-2026-98401", "field": "creation_timestamp", "uuid": "92d10c5f-6ed0-4524-96b0-d0b4aa849f6c", "content": "CVE-2026-98401 net: iptunnel: fix stale transport header during tunnel decapsulation In the Linux kernel, the following vulnerability has been resolved:\nnet: iptunnel: fix stale transport header during tunnel decapsulation\nSyzbot reported a crash in qdisc_pkt_len_segs_init() caused by a staletransport_header offset after tunnel decapsulation.\nBUG: unable to handle page fault for address: ffffed102091a42eOops: Oops: 0000 [#1] SMP KASAN NOPTICPU: 0 UID: 0 PID: 340 Comm: qdisc_uaf_repro Not tainted 7.2.0-rc4-00061-g248951ddc14d #256 PREEMPT(full)Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014RIP: 0010:__asan_load2<IRQ>qdisc_pkt_len_segs_init (net/core/dev.c:4145)__dev_queue_xmit (net/core/dev.c:4787)br_dev_queue_push_xmit (net/bridge/br_forward.c:53)br_handle_frame_finish (net/bridge/br_input.c:229)br_handle_frame (net/bridge/br_input.c:315)__netif_receive_skb_core.constprop.0 (net/core/dev.c:6099)__netif_receive_skb_list_core (net/core/dev.c:6287)netif_receive_skb_list_internal (net/core/dev.c:6445)napi_complete_done (net/core/dev.c:6813)gro_cell_poll (net/core/gro_cells.c:74)__napi_poll (net/core/dev.c:7735)net_rx_action (net/core/dev.c:7798 net/core/dev.c:7955)handle_softirqs (kernel/softirq.c:622)do_softirq (kernel/softirq.c:523  kernel/softirq.c:510 )__local_bh_enable_ip (kernel/softirq.c:450)tun_get_user (drivers/net/tun.c:1986 (discriminator 1))tun_chr_write_iter (drivers/net/tun.c:2032)\nThe issue is completely latent until qdisc read transport header incommit 7fb4c1967011 (\"net: pull headers in qdisc_pkt_len_segs_init()\").The crash requires four conditions to line up:\n1. The incoming packet is encapsulated and carries GSO metadata. The outer   transport header offset is stored in skb->transport_header while the   packet is still in the outer tunnel context.2. The tunnel receiver strips the outer headers. skb->data is advanced to   the inner frame, but skb->transport_header is left pointing to the   now-removed outer L4 header, so it becomes a negative offset relative to   the new data.3. The inner frame is not delivered to the local IP stack. Instead, it   is forwarded at L2 by a bridge or HSR, so ip_rcv_core() never runs and   the transport header is not reset to the inner L4 offset.4. The forwarding path calls __dev_queue_xmit(), which enters   qdisc_pkt_len_segs_init(). That function computes the GSO header length   from skb_transport_offset(skb). Because the offset is negative, the   unsigned cast overflows and pskb_may_pull(skb, hdr_len +   sizeof(struct tcphdr)) reads past the end of the skb, triggering a   KASAN fault or page fault.\nThe issue specifically requires GSO packets (shinfo->gso_size != 0), whichare processed/aggregated through gro_cells. Fix this by clearingtransport_header to the ~0U sentinel in gro_cell for all tunnnel driver.GTP does not support GRO/GSO, drop the evil GSO packets in GTP directly.\nhttps://www.cve.org/CVERecord?id=CVE-2026-98401https://git.kernel.org/stable/c/8c3d4dfcecf7670c1d752f1ae74b21b2af5feac1https://git.kernel.org/stable/c/e4a5b01e59f7102169762b8f566c8e052d05c0ffhttps://git.kernel.org/stable/c/3340b8565b85631cfeb0df049e8b46e3ef8bd7bdhttps://git.kernel.org/stable/c/28a57fb2c5df4deb42a06e52fd36c14b37aa0034#kernel #Linux#CVE_2026_98401#bot", "url": "https://infosec.exchange/users/cve/statuses/117440693458756497"}, {"timestamp": "2026-10-16T01:04:30Z", "date_only": false, "value": "2026-10-16T01:04:30.000Z", "kind": "other", "label": "Advisory revision", "source": "csaf_microsoft \u00b7 MSRC_CVE-2026-98401", "record": "MSRC_CVE-2026-98401", "field": "document.tracking.revision_history.0.date"}, {"timestamp": "2026-10-16T01:04:30Z", "date_only": false, "value": "2026-10-16T01:04:30.000Z", "kind": 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