---
id: CVE-2026-72061
title: 'net: sit: require CAP_NET_ADMIN in the device netns for changelink'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

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

  ipip6_changelink() operates on at most two netns, dev_net(dev) and the
  tunnel link netns t->net. The…
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 >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 <
    cb41b308e9d867725d965b291dd085028e36a480
  - >-
    Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 <
    c5a0ae895432596b2f464172da8218e2d84e2932
  - >-
    Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 <
    7d139dec96691cde96cb40ed293e2d13d994fb4f
  - >-
    Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 <
    388ccffbd2e7e5e4271f291085a7451865705305
  - >-
    Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 <
    c0ea1aedb37bb979e864ed7787975434bbd9db73
  - >-
    Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 <
    3118e97dae533fb45964b87bbed1801afcff7c65
  - >-
    Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 <
    99ae3248b33df94201915d9c32e7470cdf08cfcd
  - >-
    Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 <
    27ccb68e7cccead5d8c611665a45d23032d468b3
  - Linux 3.11
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:51:08.793068Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:53:18.844Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72061'
references:
  - url: 'https://git.kernel.org/stable/c/cb41b308e9d867725d965b291dd085028e36a480'
  - url: 'https://git.kernel.org/stable/c/c5a0ae895432596b2f464172da8218e2d84e2932'
  - url: 'https://git.kernel.org/stable/c/7d139dec96691cde96cb40ed293e2d13d994fb4f'
  - url: 'https://git.kernel.org/stable/c/388ccffbd2e7e5e4271f291085a7451865705305'
  - url: 'https://git.kernel.org/stable/c/c0ea1aedb37bb979e864ed7787975434bbd9db73'
  - url: 'https://git.kernel.org/stable/c/3118e97dae533fb45964b87bbed1801afcff7c65'
  - url: 'https://git.kernel.org/stable/c/99ae3248b33df94201915d9c32e7470cdf08cfcd'
  - url: 'https://git.kernel.org/stable/c/27ccb68e7cccead5d8c611665a45d23032d468b3'
tags:
  - cve.org
epss: 0.00176
epssPercentile: 0.0668
ingestedAt: '2026-10-16T17:24:46.875Z'
---

## Overview

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

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

ipip6_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 ipip6_changelink() on rtnl_dev_link_net_capable() at its top,
before any attribute is parsed. sit was the one tunnel type not covered
by the recent series that added this check to the other changelink()
handlers.

## Affected

- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < cb41b308e9d867725d965b291dd085028e36a480`
- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < c5a0ae895432596b2f464172da8218e2d84e2932`
- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 7d139dec96691cde96cb40ed293e2d13d994fb4f`
- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 388ccffbd2e7e5e4271f291085a7451865705305`
- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < c0ea1aedb37bb979e864ed7787975434bbd9db73`
- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 3118e97dae533fb45964b87bbed1801afcff7c65`
- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 99ae3248b33df94201915d9c32e7470cdf08cfcd`
- `Linux >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592 < 27ccb68e7cccead5d8c611665a45d23032d468b3`
- `Linux 3.11`

## Remediation

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