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CVE-2026-72052

HIGHCVSS 8.8/10EPSS 0.21%

Last modified

CVE-2026-72052 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink ip6gre_changelink() and ip6erspan_changelink() operate 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 0.21% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink ip6gre_changelink() and ip6erspan_changelink() operate 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 both ops on rtnl_dev_link_net_capable() at their top, before any attribute is parsed.

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
0.21%

11.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 690afc165bb314354667f67157c1a1aea7dc797a, < 129f8939e5af683cec3a1a5edcb40a64636ad81e; >= 690afc165bb314354667f67157c1a1aea7dc797a, < e3724dedf57761c6de52f4d604ec74f66fd61611; >= 690afc165bb314354667f67157c1a1aea7dc797a, < 220162c9fedbe992da70d70f50a10da4f45f914c; >= 690afc165bb314354667f67157c1a1aea7dc797a, < 1d4d8ee002083ca4ead5353662bf8362428af57f; >= 690afc165bb314354667f67157c1a1aea7dc797a, < 0caa9f348f8b5356900de77b0bb89a697c4aff20; >= 690afc165bb314354667f67157c1a1aea7dc797a, < 03d8843b143ebbbfaf48511922abc6e886575a61; >= 690afc165bb314354667f67157c1a1aea7dc797a, < c38c8b0db3c65b597e7ece317b6cb59de3d15e69; >= 690afc165bb314354667f67157c1a1aea7dc797a, < f00a50876d2818bd6dc86fa98b3ef360884c53c8; d0201d2405dac8d9b16773e97709925e397552d0; 7943bb0f06365cf5e32f3cf8a6b29eeae981fb8a; >= 4.19.100, < 4.20; >= 5.4.16, < 5.5
LinuxLinux5.5

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72052?
In the Linux kernel, the following vulnerability has been resolved: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink ip6gre_changelink() and ip6erspan_changelink() operate 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 both ops on rtnl_dev_link_net_capable() at their top, before any attribute is parsed.
How severe is CVE-2026-72052?
CVE-2026-72052 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72052?
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