---
id: CVE-2026-72054
title: 'net: ip_vti: require CAP_NET_ADMIN in the device netns for changelink'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: ip_vti: require CAP_NET_ADMIN in the device netns for changelink

  vti_changelink() operates on at most two netns, dev_net(dev) and the
  tunnel link netns t->net. Th…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e <
    1caf737e625143c6f23c32d2b747b1a3e42e5699
  - >-
    Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e <
    32edf8aa297745226854eda2d96c0fac66c1bb15
  - >-
    Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e <
    973ead9e565423642e4533e1547b5d2c0476fb03
  - >-
    Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e <
    33fd93961557ec8e3e9958995b28684c5f949394
  - >-
    Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e <
    6d8bc0dc99472d62c57c2a3d436e6ab408592bda
  - >-
    Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e <
    9571af2eec8023af9a1671b7f2cd4ab400011724
  - >-
    Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e <
    88b33ee458a6ca5fbef6c53b9dba772da69dab68
  - >-
    Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e <
    95cceadbfd52d7239bd730afdda0655287d77425
  - Linux 3.15
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:50:59.364061Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:53:18.394Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72054'
references:
  - url: 'https://git.kernel.org/stable/c/1caf737e625143c6f23c32d2b747b1a3e42e5699'
  - url: 'https://git.kernel.org/stable/c/32edf8aa297745226854eda2d96c0fac66c1bb15'
  - url: 'https://git.kernel.org/stable/c/973ead9e565423642e4533e1547b5d2c0476fb03'
  - url: 'https://git.kernel.org/stable/c/33fd93961557ec8e3e9958995b28684c5f949394'
  - url: 'https://git.kernel.org/stable/c/6d8bc0dc99472d62c57c2a3d436e6ab408592bda'
  - url: 'https://git.kernel.org/stable/c/9571af2eec8023af9a1671b7f2cd4ab400011724'
  - url: 'https://git.kernel.org/stable/c/88b33ee458a6ca5fbef6c53b9dba772da69dab68'
  - url: 'https://git.kernel.org/stable/c/95cceadbfd52d7239bd730afdda0655287d77425'
tags:
  - cve.org
epss: 0.00169
epssPercentile: 0.05783
ingestedAt: '2026-10-16T17:24:46.873Z'
---

## Overview

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

net: ip_vti: require CAP_NET_ADMIN in the device netns for changelink

vti_changelink() operates on at most two netns, dev_net(dev) and the
tunnel link netns t->net. They differ once the device is created in or
moved to a netns other than the one the request runs in. The rtnl
changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a
caller privileged there but not in t->net can rewrite a tunnel that
lives in t->net.

Gate vti_changelink() on rtnl_dev_link_net_capable() at its top,
before any attribute is parsed.

## Affected

- `Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e < 1caf737e625143c6f23c32d2b747b1a3e42e5699`
- `Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e < 32edf8aa297745226854eda2d96c0fac66c1bb15`
- `Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e < 973ead9e565423642e4533e1547b5d2c0476fb03`
- `Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e < 33fd93961557ec8e3e9958995b28684c5f949394`
- `Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e < 6d8bc0dc99472d62c57c2a3d436e6ab408592bda`
- `Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e < 9571af2eec8023af9a1671b7f2cd4ab400011724`
- `Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e < 88b33ee458a6ca5fbef6c53b9dba772da69dab68`
- `Linux >= 895de9a3488abcdd186680f0af3cce7f2d4d4a6e < 95cceadbfd52d7239bd730afdda0655287d77425`
- `Linux 3.15`

## Remediation

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