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Vulnerabilities CVE-2026-72136

CVE-2026-72136

None
Open
TLP:CLEAR

xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink

AI Analysis

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Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: xfrm_interface: require CAP_NET_ADMIN in the device netns for changelink xfrmi_changelink() operates on at most two netns, dev_net(dev) and the interface link netns xi->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 xi->net can rewrite an interface that lives in xi->net. Gate xfrmi_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.

Details

Confidence
90%
Published
Aug 15, 2026
Last Modified
Aug 15, 2026
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