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.
History

Sat, 15 Aug 2026 09:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-269
CWE-284

Sat, 15 Aug 2026 06:00:00 +0000

Type Values Removed Values Added
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.
Title net: ip6_vti: require CAP_NET_ADMIN in the device netns for changelink
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:52:11.413Z

Reserved: 2026-08-09T03:40:39.903Z

Link: CVE-2026-72055

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:21:14.890

Modified: 2026-08-15T06:21:14.890

Link: CVE-2026-72055

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T12:00:05Z