CVE-2026-72051

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: ip6_tunnel: require CAP_NET_ADMIN in the device netns for changelink

ip6_tnl_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 ip6_tnl_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0bd8762824e73a3cce7b7560a97463301764b616 < 2d53ee7daabe733deb81f51d2cc90188f8ad59a1affected
LinuxLinux0bd8762824e73a3cce7b7560a97463301764b616 < 82e53e7281c71e174f9f5877c566a623c637b406affected
LinuxLinux0bd8762824e73a3cce7b7560a97463301764b616 < 5252db8fb604321133138c7069d6fc3fcd89cdeeaffected
LinuxLinux0bd8762824e73a3cce7b7560a97463301764b616 < 2636d061bc237a2446a146e42dcc6563acfa7432affected
LinuxLinux0bd8762824e73a3cce7b7560a97463301764b616 < 7f68f7928484f463a5bc0d50e6fdd8d16f55a5aaaffected
LinuxLinux0bd8762824e73a3cce7b7560a97463301764b616 < 234cd54fc500f69db43e37de38603da617fbbeeaaffected
LinuxLinux0bd8762824e73a3cce7b7560a97463301764b616 < d4bcc202a3530c856e1cb183384bc9cc8fddab22affected
LinuxLinux0bd8762824e73a3cce7b7560a97463301764b616 < 2496fa0b7d180b3ad356b514e7ff93bb14e6140aaffected
LinuxLinux3.12affected
LinuxLinux0 < 3.12unaffected
LinuxLinux5.10.266 <= 5.10.*unaffected
LinuxLinux5.15.217 <= 5.15.*unaffected
LinuxLinux6.1.184 <= 6.1.*unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References