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CVE-2026-72061

HIGHCVSS 8.8/10EPSS 0.22%

Last modified

CVE-2026-72061 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
0.22%

12.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592, < cb41b308e9d867725d965b291dd085028e36a480; >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592, < c5a0ae895432596b2f464172da8218e2d84e2932; >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592, < 7d139dec96691cde96cb40ed293e2d13d994fb4f; >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592, < 388ccffbd2e7e5e4271f291085a7451865705305; >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592, < c0ea1aedb37bb979e864ed7787975434bbd9db73; >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592, < 3118e97dae533fb45964b87bbed1801afcff7c65; >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592, < 99ae3248b33df94201915d9c32e7470cdf08cfcd; >= 5e6700b3bf98fe98d630bf9c939ad4c85ce95592, < 27ccb68e7cccead5d8c611665a45d23032d468b3
LinuxLinux3.11

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72061?
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.
How severe is CVE-2026-72061?
CVE-2026-72061 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72061?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST