CVE-2026-31678

A flaw was found in the Linux kernel's Open vSwitch (OVS) component. A race condition can occur during the destruction of a network device (netdev) tunnel, where the ovs_netdev_tunnel_destroy() function may attempt to release a device reference while other parts of the system are still actively using it. This timing issue, or race condition, could lead to system instability or a denial of service (DoS) due to improper resource handling.

Open vSwitch tunnel destroy could drop netdev references too early; upstream defers netdev_put() to RCU free. Red Hat recommends OVS users take virtualization/networking kernel updates.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, prevent the openvswitch module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.