---
id: CVE-2026-72319
title: 'ipvs: ensure inner headers in ICMP errors are in headroom'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ipvs: ensure inner headers in ICMP errors are in headroom

  Sashiko points out that after stripping the outer headers
  with pskb_pull() we should ensure the inner IP head…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e <
    19657b3a17b774ae4e2f2635b5ae8638c9344a40
  - >-
    Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e <
    dac813101914c21219ac221a60a31a11bc90e7ec
  - >-
    Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e <
    dd22f74a09e25ca298ced0a3763ef353242cb78d
  - >-
    Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e <
    9bc9b95aee2b2e3f1301a16a67ee504960402875
  - >-
    Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e <
    a735f9964a3d9ed97daf9b08507f8b5bcafe6326
  - >-
    Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e <
    8f48cfe657409fb5c7ba0521b14da6d47546d9cf
  - >-
    Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e <
    92185d6f7819bc558939ae83de7b1abe90e3b5c2
  - >-
    Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e <
    3f7a535ff0fa627a0132803e4c2f903ceffcbc1c
  - Linux 3.7
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-16T18:46:50.262793Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:55:17.469Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72319'
references:
  - url: 'https://git.kernel.org/stable/c/19657b3a17b774ae4e2f2635b5ae8638c9344a40'
  - url: 'https://git.kernel.org/stable/c/dac813101914c21219ac221a60a31a11bc90e7ec'
  - url: 'https://git.kernel.org/stable/c/dd22f74a09e25ca298ced0a3763ef353242cb78d'
  - url: 'https://git.kernel.org/stable/c/9bc9b95aee2b2e3f1301a16a67ee504960402875'
  - url: 'https://git.kernel.org/stable/c/a735f9964a3d9ed97daf9b08507f8b5bcafe6326'
  - url: 'https://git.kernel.org/stable/c/8f48cfe657409fb5c7ba0521b14da6d47546d9cf'
  - url: 'https://git.kernel.org/stable/c/92185d6f7819bc558939ae83de7b1abe90e3b5c2'
  - url: 'https://git.kernel.org/stable/c/3f7a535ff0fa627a0132803e4c2f903ceffcbc1c'
tags:
  - cve.org
epss: 0.00755
epssPercentile: 0.54209
ingestedAt: '2026-10-16T19:46:24.408Z'
---

## Overview

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

ipvs: ensure inner headers in ICMP errors are in headroom

Sashiko points out that after stripping the outer headers
with pskb_pull() we should ensure the inner IP headers
in ICMP errors from tunnels are present in the skb headroom
for functions like ipv4_update_pmtu(), icmp_send() and
IP_VS_DBG().

Also, add more checks for the length of the inner headers.

## Affected

- `Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 19657b3a17b774ae4e2f2635b5ae8638c9344a40`
- `Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < dac813101914c21219ac221a60a31a11bc90e7ec`
- `Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < dd22f74a09e25ca298ced0a3763ef353242cb78d`
- `Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 9bc9b95aee2b2e3f1301a16a67ee504960402875`
- `Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < a735f9964a3d9ed97daf9b08507f8b5bcafe6326`
- `Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 8f48cfe657409fb5c7ba0521b14da6d47546d9cf`
- `Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 92185d6f7819bc558939ae83de7b1abe90e3b5c2`
- `Linux >= f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e < 3f7a535ff0fa627a0132803e4c2f903ceffcbc1c`
- `Linux 3.7`

## Remediation

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