CVE-2026-72061 json
net: sit: require CAP_NET_ADMIN in the device netns for changelink
published 2026-08-15 2 mo ago modified 2026-10-19 20 d ago also EUVD-2026-59019
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
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. 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.
Patch / fix
- Linux Linux 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2
- linux Debian 12 6.1.180-1
- linux Debian 13 6.12.100-1
- linux Debian 14 7.1.5-1
debian advisories DEBIAN-CVE-2026-72061
- linux Ubuntu 22.04 LTS 5.15.0-198.208
- linux Ubuntu 24.04 LTS 6.8.0-147.147
- linux Ubuntu 26.04 LTS 7.0.0-38.38
- linux-aws Ubuntu 22.04 LTS 5.15.0-1117.124
- linux-aws Ubuntu 24.04 LTS 6.8.0-1067.70
- linux-aws Ubuntu 26.04 LTS 7.0.0-1014.14
- linux-gcp Ubuntu 22.04 LTS 5.15.0-1118.128
- linux-gcp Ubuntu 24.04 LTS 6.8.0-1071.79
ubuntu advisories UBUNTU-CVE-2026-72061
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.84.1
- kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.84.1
- kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.84.1
- kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.84.1
- kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.84.1
- kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.84.1
- kernel-obs-build SLE Module for Development Tools 15 SP7 6.4.0-150700.53.84.1
- kernel-default-base SLE Module for Basesystem 15 SP7 6.4.0-150700.53.84.1.150700.17.47.1
suse advisories SUSE-SU-2026:4706-1SUSE-SU-2026:4687-1SUSE-SU-2026:4668-1SUSE-SU-2026:4667-1SUSE-SU-2026:4666-1SUSE-SU-2026:4665-1
- kernel-rt openSUSE Leap 16.0 6.12.0-160000.38.1
- dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-64kb openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-syms openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-azure openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-source openSUSE Leap 16.0 6.12.0-160000.38.1
- kernel-default openSUSE Leap 16.0 6.12.0-160000.38.1
opensuse advisories openSUSE-SU-2026:21910-1
- git.kernel.org/stable/c/cb41b308e9d867725d965b291dd085028e36a480 commit
- git.kernel.org/stable/c/c5a0ae895432596b2f464172da8218e2d84e2932 commit
- git.kernel.org/stable/c/7d139dec96691cde96cb40ed293e2d13d994fb4f commit
- git.kernel.org/stable/c/388ccffbd2e7e5e4271f291085a7451865705305 commit
- git.kernel.org/stable/c/c0ea1aedb37bb979e864ed7787975434bbd9db73 commit
- git.kernel.org/stable/c/3118e97dae533fb45964b87bbed1801afcff7c65 commit
- git.kernel.org/stable/c/99ae3248b33df94201915d9c32e7470cdf08cfcd commit
- git.kernel.org/stable/c/27ccb68e7cccead5d8c611665a45d23032d468b3 commit
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-72061 updated cvss 7.8
kernel: net: sit: require CAP_NET_ADMIN in the device netns for changelink
-
Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernelaffected: workaround, no fix available
-
Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 morenot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 23 d ago
Exploit prediction
0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected products
- Linux Linux
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- git.kernel.org /stable/c/cb41b308e9d867725d965b291dd085028e36a480
- git.kernel.org /stable/c/c5a0ae895432596b2f464172da8218e2d84e2932
- git.kernel.org /stable/c/7d139dec96691cde96cb40ed293e2d13d994fb4f
- git.kernel.org /stable/c/388ccffbd2e7e5e4271f291085a7451865705305
- git.kernel.org /stable/c/c0ea1aedb37bb979e864ed7787975434bbd9db73
- git.kernel.org /stable/c/3118e97dae533fb45964b87bbed1801afcff7c65
- git.kernel.org /stable/c/99ae3248b33df94201915d9c32e7470cdf08cfcd
- git.kernel.org /stable/c/27ccb68e7cccead5d8c611665a45d23032d468b3
Sources
- CVE List CVE-2026-72061
- NVD CVE-2026-72061
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.