{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.111-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.7-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  net: icmp: avoid invalid transport header access in icmp_send tracepoint  syzbot reported a WARNING triggered by DEBUG_NET_WARN_ON_ONCE():   WARNING: at skb_transport_header include/linux/skbuff.h:3087 [inline]  WARNING: at udp_hdr include/linux/udp.h:23 [inline]  WARNING: at do_trace_event_raw_event_icmp_send include/trace/events/icmp.h:30 [inline]  WARNING: at trace_event_raw_event_icmp_send+0x48c/0x6ec include/trace/events/icmp.h:11  Call trace:   skb_transport_header include/linux/skbuff.h:3087 [inline]   udp_hdr include/linux/udp.h:23 [inline]   do_trace_event_raw_event_icmp_send include/trace/events/icmp.h:30 [inline]   trace_event_raw_event_icmp_send+0x48c/0x6ec include/trace/events/icmp.h:11   __traceiter_icmp_send include/trace/events/icmp.h:11 [inline]   __do_trace_icmp_send include/trace/events/icmp.h:11 [inline]   trace_icmp_send+0x320/0x49c include/trace/events/icmp.h:11   __icmp_send+0xcfc/0x11d8 net/ipv4/icmp.c:1013   ipv4_send_dest_unreach net/ipv4/route.c:1280 [inline]   ipv4_link_failure+0x57c/0x8dc net/ipv4/route.c:1287   dst_link_failure include/net/dst.h:438 [inline]   vti_tunnel_xmit+0xe40/0x17a4 net/ipv4/ip_vti.c:307  TP_fast_assign() unconditionally calls udp_hdr(skb) before checking whether the packet is UDP. Furthermore, __icmp_send() can be invoked from paths (e.g., link failures, ARP errors, forwarding, AF_PACKET) where skb-\u003etransport_header was never initialized (~0U).  Under CONFIG_DEBUG_NET=y, calling skb_transport_header(skb) triggers DEBUG_NET_WARN_ON_ONCE(!skb_transport_header_was_set(skb)).  Fix this by: 1. Only parsing transport info when iph-\u003eprotocol == IPPROTO_UDP. 2. Using skb_header_pointer() at skb_network_offset(skb) + (iph-\u003eihl \u003c\u003c 2)    to safely fetch the UDP header without assuming transport_header is set.",
  "id": "DEBIAN-CVE-2026-98402",
  "modified": "2026-10-15T04:47:22.650725554Z",
  "published": "2026-10-14T14:17:51.257Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98402"
    }
  ],
  "upstream": [
    "CVE-2026-98402"
  ]
}