CVE-2026-72055

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux61220ab349485d911083d0b7990ccd3db6c63297 < f5254e7766b4ac02b66b2ccef896cd278503cb11affected
LinuxLinux61220ab349485d911083d0b7990ccd3db6c63297 < ef897249dc957089e6f7f11ceea699e093ad51bdaffected
LinuxLinux61220ab349485d911083d0b7990ccd3db6c63297 < f6e8b52a2cb3bbd72ddc2d44e474b907b9dcf5baaffected
LinuxLinux61220ab349485d911083d0b7990ccd3db6c63297 < c64b9ae7eb97e81d54b792910a3aeafd92566c79affected
LinuxLinux61220ab349485d911083d0b7990ccd3db6c63297 < b2b61c540571b3cc2f461e2a579ba2cc8c2a52cfaffected
LinuxLinux61220ab349485d911083d0b7990ccd3db6c63297 < 0b2f9c908f930ec4be17d389723f9a202d6a883caffected
LinuxLinux61220ab349485d911083d0b7990ccd3db6c63297 < f97e93ebf2f9b8ef3b87f7a9371255e84d151587affected
LinuxLinux61220ab349485d911083d0b7990ccd3db6c63297 < e2ac3b242c37dff323a964962e43854f4b1a2b79affected
LinuxLinux3.15affected
LinuxLinux0 < 3.15unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References