CVE-2026-72055
Last modified
CVE-2026-72055 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_vti: require CAP_NET_ADMIN in the device netns for changelink vti6_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 0.21% chance of exploitation in the next 30 days.
Description
In the Linux kernel, the following vulnerability has been resolved: net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink vti6_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 vti6_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 61220ab349485d911083d0b7990ccd3db6c63297, < f5254e7766b4ac02b66b2ccef896cd278503cb11; >= 61220ab349485d911083d0b7990ccd3db6c63297, < ef897249dc957089e6f7f11ceea699e093ad51bd; >= 61220ab349485d911083d0b7990ccd3db6c63297, < f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba; >= 61220ab349485d911083d0b7990ccd3db6c63297, < c64b9ae7eb97e81d54b792910a3aeafd92566c79; >= 61220ab349485d911083d0b7990ccd3db6c63297, < b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf; >= 61220ab349485d911083d0b7990ccd3db6c63297, < 0b2f9c908f930ec4be17d389723f9a202d6a883c; >= 61220ab349485d911083d0b7990ccd3db6c63297, < f97e93ebf2f9b8ef3b87f7a9371255e84d151587; >= 61220ab349485d911083d0b7990ccd3db6c63297, < e2ac3b242c37dff323a964962e43854f4b1a2b79 |
| Linux | Linux | 3.15 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-72055?
How severe is CVE-2026-72055?
How do I fix CVE-2026-72055?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-7205A vulnerability was identified in duartium papers-mcp-server…7.3
- CVE-2026-72050In the Linux kernel, the following vulnerability has been re…
- CVE-2026-72051In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-72052In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-72053In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-72054In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-72056In the Linux kernel, the following vulnerability has been re…
- CVE-2026-72057In the Linux kernel, the following vulnerability has been re…8.2
- CVE-2026-72058In the Linux kernel, the following vulnerability has been re…
- CVE-2026-72059In the Linux kernel, the following vulnerability has been re…
- CVE-2026-7206A security flaw has been discovered in dubydu sqlite-mcp up …7.3
- CVE-2026-72060In the Linux kernel, the following vulnerability has been re…
Are you affected by CVE-2026-72055?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST