Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.3, < 6.1.168 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896Patch
- https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486cPatch
- https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eabPatch
- https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffcPatch
- https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8Patch
- https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643Patch
FAQ
What is CVE-2026-31678?
CVE-2026-31678 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 t...
How severe is CVE-2026-31678?
CVE-2026-31678 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31678?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.