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net: icmp: avoid invalid transport header access in icmp_send tracepoint

Type: advisorySource: Official CVE List1 source record

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->transport_header was never initialized (~0U). Under CONFIG_DEBUG_NET=y, calling skb_trans

Announced Group revision 1
Original source ↗

CVE-2026-98402

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98402

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "524c341cb16a8d5318d2ffacf6fe160271a18743",
        "lessThan": "ec6d4612d1c170e1cef1fe55526471da1e81e777",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "21b28f97e621cba196fb32c576734d216a8a79c9",
        "lessThan": "99654b651c6d5fe865798a2adb859767905f9278",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "db3efdcf70c752e8a8deb16071d8e693c3ef8746",
        "lessThan": "b972b5e6168dc5d1e13297b1f37f71d6b21cc0f1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "db3efdcf70c752e8a8deb16071d8e693c3ef8746",
        "lessThan": "04c0d35bac5122b533672a6775851dfae84e265e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "db3efdcf70c752e8a8deb16071d8e693c3ef8746",
        "lessThan": "2b32f8c3560905582fb12ed68315a6e606367a6a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "db3efdcf70c752e8a8deb16071d8e693c3ef8746",
        "lessThan": "7fcc2fe39fed1cb98a7374a113ff3800e8f9af80",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6.1.130",
        "lessThan": "6.1.189",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.6.81",
        "lessThan": "6.6.158",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "include/trace/events/icmp.h"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "include/trace/events/icmp.h"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98402

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38468 · Revision 1
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Publisher date
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Revision history

  1. CVE-2026-98402 · Revision 1Source updated