---
id: CVE-2026-98417
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: xfrm: reject unrepresentable espintcp transport headers

  ESP-in-TCP can hand xfrm packets whose transport header offset no longer
  fits after the stream parser trim…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: xfrm: reject unrepresentable espintcp transport headers

  ESP-in-TCP can hand xfrm packets whose transport header offset no longer
  fits after the stream parser trim…
severity: high
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T14:17:53.040'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98417'
references:
  - url: 'https://git.kernel.org/stable/c/206f396f46149dc8bc4dfd2b54b9879ba3ee1d7d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/327b2a457dd7d5445f7395f371f3c65de79bd5ce'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4a8243fd2e21980fa3fd10c0610e9155057cebd3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6c29681207bc213188afa603dff2d55e7178a341'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/96f01b53c2d05e003b040892256de54a586e8529'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b2b84e73e0386ad0b4f9b8d3afde343e761f5275'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cce630c751279e974fa0bb574d80575e0cc7e8f3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d37a5b87577c4b4c1a1dcb000a9dff1df2cf886b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98417.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98417'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2552211'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98417'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98417'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98417.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-10-14T15:36:13.986Z'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <
    d37a5b87577c4b4c1a1dcb000a9dff1df2cf886b
  - >-
    Linux >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <
    6c29681207bc213188afa603dff2d55e7178a341
  - >-
    Linux >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <
    4a8243fd2e21980fa3fd10c0610e9155057cebd3
  - >-
    Linux >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <
    b2b84e73e0386ad0b4f9b8d3afde343e761f5275
  - >-
    Linux >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <
    327b2a457dd7d5445f7395f371f3c65de79bd5ce
  - >-
    Linux >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <
    cce630c751279e974fa0bb574d80575e0cc7e8f3
  - >-
    Linux >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <
    206f396f46149dc8bc4dfd2b54b9879ba3ee1d7d
  - >-
    Linux >= e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 <
    96f01b53c2d05e003b040892256de54a586e8529
  - Linux 5.6
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-681
epss: 0.0022
epssPercentile: 0.12449
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

net: xfrm: reject unrepresentable espintcp transport headers

ESP-in-TCP can hand xfrm packets whose transport header offset no longer
fits after the stream parser trims the TCP envelope. The plain transport
header reset truncates that offset and triggers the skb warning path.

Use the careful transport-header helper and drop the skb through the
existing XFRM error path when the offset cannot be represented.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98417.json)