{"metadata": {"vulnerability": "CVE-2026-98954", "count": 41, "kinds": {"milestone": 11, "sighting": 1, "kev": 0, "other": 29}, "linked_omitted": 0}, "data": [{"timestamp": "2026-09-25T10:25:14.382Z", "date_only": false, "value": "2026-09-25T10:25:14.382Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-98954", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-23T12:19:13.873Z", "date_only": false, "value": "2026-10-23T12:19:13.873Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-98954", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-23T12:19:13.873Z", "date_only": false, "value": "2026-10-23T12:19:13.873Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-98954", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-10-23T12:19:13.873Z", "date_only": false, "value": "2026-10-23T12:19:13.873Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / Linux", "record": "CVE-2026-98954", "field": "containers.cna.providerMetadata.dateUpdated"}, {"timestamp": "2026-10-23T13:05:10.042Z", "date_only": false, "value": "2026-10-23T13:05:10.042310Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117490365859746808", "record": "CVE-2026-98954", "field": "creation_timestamp", "uuid": "1cbb5770-e37f-493f-8ee8-6e627522f2e7", "content": "CVE-2026-98954 net: always dissect GSO packets in __virtio_net_hdr_to_skb() In the Linux kernel, the following vulnerability has been resolved:\nnet: always dissect GSO packets in __virtio_net_hdr_to_skb()\nCommit 9e8db5913264 (\"net: avoid false positives in untrusted gsovalidation\") added a '&& skb->network_header' check before flow-dissectingGSO packets without VIRTIO_NET_HDR_F_NEEDS_CSUM in__virtio_net_hdr_to_skb(), because some callers (such as tun_get_user(),tun_xdp_one(), virtnet_receive_done(), and raw_verify_header()) calledvirtio_net_hdr_*_to_skb() before initializing skb->network_header andskb->dev.\nBecause __alloc_skb() and __build_skb_around() zero-initializeskb->network_header to 0 (unlike mac_header and transport_header whichare initialized to ~0U), those four callers always hadskb->network_header == 0 and bypassed flow dissection in__virtio_net_hdr_to_skb(). More generally, skb->network_header is anoffset from skb->head (where 0 is also a valid offset wheneverskb_headroom(skb) is 0), not a boolean flag.\nWhenever the 'if (gso_type && skb->network_header)' branch was skipped,the fallback 'else if (gso_type)' only pulled nh_min_len + thlen (40 bytesfor TCPv4) without dissecting the packet, without validating ip_proto orn_proto, and without setting skb->transport_header.\nIf the packet has a malformed network header, it is not rejected and asubsequent skb_probe_transport_header() also fails, leavingskb->transport_header at ~0U (0xffff). Similarly, if an IPv4 packetcarries IP options (ihl > 5) or an IPv6 packet carries extension headers,pulling only nh_min_len + thlen can leave the TCP header outsideskb->head. In both cases, tcp_hdrlen(skb) in skb_gso_transport_seglen()reads out-of-bounds:\n  BUG: KASAN: slab-out-of-bounds in skb_gso_transport_seglen  Read of size 2 by task poc/133  skb_gso_transport_seglen (net/core/gso.c:155)  skb_gso_validate_mac_len (net/core/gso.c:270)  tbf_enqueue (net/sched/sch_tbf.c:260)  dev_qdisc_enqueue (net/core/dev.c:4227)  __dev_queue_xmit (net/core/dev.c:4884)\nIn addition, checking virtio_net_hdr_match_proto() only inside'if (!skb->protocol)' before flow dissection both skipped validation whenskb->protocol was pre-set by the caller and rejected VLAN-tagged frameswhose outer L2 protocol is ETH_P_8021Q or ETH_P_8021AD.\nFix this by:1. Initializing skb->dev and skb->network_header (plus skb->protocol for   IFF_TUN) before virtio_net_hdr_*_to_skb() in tun_get_user(),   tun_xdp_one(), virtnet_receive_done(), and raw_verify_header(). In   tun_get_user(), drop the redundant skb_reset_mac_header(skb) in the   IFF_TUN case since __virtio_net_hdr_to_skb() unconditionally resets   mac_header.2. Removing '&& skb->network_header' and the unvalidated   'else if (gso_type)' fallback in __virtio_net_hdr_to_skb() so all GSO   packets without VIRTIO_NET_HDR_F_NEEDS_CSUM are flow-dissected, have   their transport header pulled into linear data, and have   skb->transport_header set.3. Moving the virtio_net_hdr_match_proto() check to after   skb_flow_dissect_flow_keys_basic(), validating keys.basic.n_proto   against hdr_gso_type.\nhttps://www.cve.org/CVERecord?id=CVE-2026-98954https://git.kernel.org/stable/c/5f4dfdf0077730e9d3ef5b37ceb17a5a56d6f34chttps://git.kernel.org/stable/c/44378d02c5aaae24b60a75fbbb539b4aa4db503d#kernel #Linux#CVE_2026_98954#bot", "url": "https://infosec.exchange/users/cve/statuses/117490365859746808"}, {"timestamp": "2026-10-23T13:17:00Z", "date_only": false, "value": "2026-10-23T13:17:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-98954", "record": "UBUNTU-CVE-2026-98954", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T13:17:16Z", "date_only": false, "value": "2026-10-23T13:17:16Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-27VC-2785-HFJH", "record": "GHSA-27VC-2785-HFJH", 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