---
id: CVE-2026-72055
title: >-
  kernel: net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink
  (CVE-2026-72055)
summary: >-
  A flaw was found in the Linux kernel's `ip6_vti` component, which handles IPv6
  Virtual Tunnel Interfaces. A local attacker with certain network
  administration privileges in one isolated network environment (network
  namespace) could exploit…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H'
cvssSource: vendor
cwe: CWE-863
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
published: '2026-08-15'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T11:08:17+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72055.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72055.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-72055'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2516421'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-72055'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72055'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-72055'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026081516-CVE-2026-72055-41c4@gregkh/T
  - url: 'https://git.kernel.org/stable/c/f5254e7766b4ac02b66b2ccef896cd278503cb11'
  - url: 'https://git.kernel.org/stable/c/ef897249dc957089e6f7f11ceea699e093ad51bd'
  - url: 'https://git.kernel.org/stable/c/f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba'
  - url: 'https://git.kernel.org/stable/c/c64b9ae7eb97e81d54b792910a3aeafd92566c79'
  - url: 'https://git.kernel.org/stable/c/b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf'
  - url: 'https://git.kernel.org/stable/c/0b2f9c908f930ec4be17d389723f9a202d6a883c'
  - url: 'https://git.kernel.org/stable/c/f97e93ebf2f9b8ef3b87f7a9371255e84d151587'
  - url: 'https://git.kernel.org/stable/c/e2ac3b242c37dff323a964962e43854f4b1a2b79'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00151
epssPercentile: 0.04207
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:51:02.327568Z'
scores:
  vendor: 6.1
  cna: 8.8
ingestedAt: '2026-10-16T17:24:46.874Z'
---

## Overview

A flaw was found in the Linux kernel's `ip6_vti` component, which handles IPv6 Virtual Tunnel Interfaces. A local attacker with certain network administration privileges in one isolated network environment (network namespace) could exploit this vulnerability. This allows them to modify the configuration of a tunnel in a different isolated network environment where they do not have full administrative rights, potentially leading to unauthorized network changes or the redirection of network traffic.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72055.json)

**kernel: net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink** — rated Moderate by Red Hat. Released 2026-08-15, updated 2026-10-26.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9

Not affected:

- Red Hat Enterprise Linux 6

## Remediation

Affected

Workarounds / mitigations:

- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.