---
id: CVE-2026-45850
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ipvs: skip ipv6 extension headers for csum checks

  Protocol checksum validation fails for IPv6 if there are extension
  headers before the protocol header
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ipvs: skip ipv6 extension headers for csum checks

  Protocol checksum validation fails for IPv6 if there are extension
  headers before the protocol header. iph->len alrea…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 2.6.28, < 5.10.259'
  - 'linux_kernel >= 5.11, < 5.15.210'
  - 'linux_kernel >= 5.16, < 6.1.176'
  - 'linux_kernel >= 6.2, < 6.6.143'
  - 'linux_kernel >= 6.7, < 6.12.94'
  - 'linux_kernel >= 6.13, < 6.18.36'
  - 'linux_kernel >= 6.19, < 6.19.4'
patched:
  - linux_kernel 6.19.4
published: '2026-05-27'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:37.600'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45850'
references:
  - url: 'https://git.kernel.org/stable/c/05cfe9863ef049d98141dc2969eefde72fb07625'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/0bf92a90bf05ecafe52e92d5bc15a585021a64ac'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/54add3b7d3c154ca89ef5bac2582b0ed1a3a15d5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/768f665f3685b455ed686370ed7ccb852a125a3b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9aa7edc1347b98774e5167ca34e5b8aa6083bde7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a3ca27762ce8476b4fbf9b2a8f5cb74c38e483e4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cdce1e797addab72393c0dfee31aaca41ef7d937'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d643c1ec80b70508f54dac12179e36920e2c00de'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.0016
epssPercentile: 0.04779
ingestedAt: '2026-10-15T03:30:12.879Z'
---

## Overview

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

ipvs: skip ipv6 extension headers for csum checks

Protocol checksum validation fails for IPv6 if there are extension
headers before the protocol header. iph->len already contains its
offset, so use it to fix the problem.

## Affected

- `linux_kernel >= 2.6.28, < 5.10.259`
- `linux_kernel >= 5.11, < 5.15.210`
- `linux_kernel >= 5.16, < 6.1.176`
- `linux_kernel >= 6.2, < 6.6.143`
- `linux_kernel >= 6.7, < 6.12.94`
- `linux_kernel >= 6.13, < 6.18.36`
- `linux_kernel >= 6.19, < 6.19.4`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.4`