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CVE-2026-72136

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected f203b76d78092faf248db3f851840fbecf80b40e before 04c1aa57d08471b1953bf27c84ac9b3d78d71831; affected f203b76d78092faf248db3f851840fbecf80b40e before bdfd1c21d90e628a58a9de79e024cdfcbedfa15c; affected f203b76d78092faf248db3f851840fbecf80b40e before 80ec68bba11f7f387c0e4099c2d7b2c84943eb99; affected f203b76d78092faf248db3f851840fbecf80b40e before e9c90756f10da334fb31552e52c61f1dba69f491; affected f203b76d78092faf248db3f851840fbecf80b40e before 37b61946d278c7deb0d40ba8f2b6fc0478d61dab; affected f203b76d78092faf248db3f851840fbecf80b40e before 8ca2a19a987a7d1cb4c916ed9723a1c6993b4276; affected f203b76d78092faf248db3f851840fbecf80b40e before 3ba2b2ef7d6a63b190f15cfc2b4ba0fba59928ea; affected f203b76d78092faf248db3f851840fbecf80b40e before 095515d89b19b6cc19dfcdc846f97403ed1ebce3
Linux / Linuxaffected 4.19; unaffected 0 before 4.19; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.