CVE-2026-31678

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

openvswitch: defer tunnel netdev_put to RCU release

ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already

detached the device. Dropping the netdev reference in destroy can race

with concurrent readers that still observe vport->dev.

Do not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let

vport_netdev_free() drop the reference from the RCU callback, matching

the non-tunnel destroy path and avoiding additional synchronization

under RTNL.