CVE-2026-72055

HighCVSS 8.8/10Last modified Oct 19, 2026

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 8.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-862

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 61220ab349485d911083d0b7990ccd3db6c63297, < f5254e7766b4ac02b66b2ccef896cd278503cb11; >= 61220ab349485d911083d0b7990ccd3db6c63297, < ef897249dc957089e6f7f11ceea699e093ad51bd; >= 61220ab349485d911083d0b7990ccd3db6c63297, < f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5ba; >= 61220ab349485d911083d0b7990ccd3db6c63297, < c64b9ae7eb97e81d54b792910a3aeafd92566c79; >= 61220ab349485d911083d0b7990ccd3db6c63297, < b2b61c540571b3cc2f461e2a579ba2cc8c2a52cf; >= 61220ab349485d911083d0b7990ccd3db6c63297, < 0b2f9c908f930ec4be17d389723f9a202d6a883c; >= 61220ab349485d911083d0b7990ccd3db6c63297, < f97e93ebf2f9b8ef3b87f7a9371255e84d151587; >= 61220ab349485d911083d0b7990ccd3db6c63297, < e2ac3b242c37dff323a964962e43854f4b1a2b79
LinuxLinux3.15

References

Timeline

Published
Aug 15, 2026
Last modified
Oct 19, 2026
NVD status
Received

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CVE-2026-72055: High severity, CVSS 8.8 | Vulnix