CVE-2026-98402Public exploit

Kernel warning via unchecked transport-header access

Published Oct 14, 2026 · Updated Oct 14, 2026

Invalid header access in Linux Kernel 6.10's icmp_send tracepoint allows attackers to trigger a warning via packet processing. TP_fast_assign() calls udp_hdr(skb) before checking the packet protocol and assumes an initialized transport_header even on link-failure, forwarding, and AF_PACKET paths. The documented warning requires CONFIG_DEBUG_NET=y and execution of the tracepoint; the sources do not establish a service crash, data disclosure, or privilege escalation.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Invalid header access in Linux Kernel 6.10's icmp_send tracepoint allows attackers to trigger a warning via packet processing. TP_fast_assign() calls udp_hdr(skb) before checking the packet protocol and assumes an initialized transport_header even on link-failure, forwarding, and AF_PACKET paths. The documented warning requires CONFIG_DEBUG_NET=y and execution of the tracepoint; the sources do not establish a service crash, data disclosure, or privilege escalation.

The record

CVE
CVE-2026-98402
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
Linux Foundation
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=21b28f97e621cba196fb32c576734d216a8a79c9 <99654b651c6d5fe865798a2adb859767905f9278
  2. Affected versionversion=524c341cb16a8d5318d2ffacf6fe160271a18743 <ec6d4612d1c170e1cef1fe55526471da1e81e777
  3. Affected versionversion=6.10
  4. Affected versionversion=6.1.130 <6.1.189
  5. Affected versionversion=6.6.81 <6.6.158
  6. Affected versionversion=db3efdcf70c752e8a8deb16071d8e693c3ef8746 <04c0d35bac5122b533672a6775851dfae84e265e
  7. Affected versionversion=db3efdcf70c752e8a8deb16071d8e693c3ef8746 <2b32f8c3560905582fb12ed68315a6e606367a6a
  8. Affected versionversion=db3efdcf70c752e8a8deb16071d8e693c3ef8746 <7fcc2fe39fed1cb98a7374a113ff3800e8f9af80
  9. Affected versionversion=db3efdcf70c752e8a8deb16071d8e693c3ef8746 <b972b5e6168dc5d1e13297b1f37f71d6b21cc0f1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Linux Foundation · Linux Kernelversion=21b28f97e621cba196fb32c576734d216a8a79c9 <99654b651c6d5fe865798a2adb859767905f9278; version=524c341cb16a8d5318d2ffacf6fe160271a18743 <ec6d4612d1c170e1cef1fe55526471da1e81e777; version=6.10; version=6.1.130 <6.1.189; version=6.6.81 <6.6.158; version=db3efdcf70c752e8a8deb16071d8e693c3ef8746 <04c0d35bac5122b533672a6775851dfae84e265e; version=db3efdcf70c752e8a8deb16071d8e693c3ef8746 <2b32f8c3560905582fb12ed68315a6e606367a6a; version=db3efdcf70c752e8a8deb16071d8e693c3ef8746 <7fcc2fe39fed1cb98a7374a113ff3800e8f9af80; version=db3efdcf70c752e8a8deb16071d8e693c3ef8746 <b972b5e6168dc5d1e13297b1f37f71d6b21cc0f1

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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