CVE-2026-31678
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
41/100
Published: 2026-04-25
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
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.
Affected Software (14)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | a9020fde67a6eb77f8130feff633189f99264db1 < f0ec49d3a39c1f5a4f3270ea27ca0854fad2a2a2 |
| Linux | Linux | a9020fde67a6eb77f8130feff633189f99264db1 < 9d56aced21fb9c104e8a3f3be9b21fbafe448ffc |
| Linux | Linux | a9020fde67a6eb77f8130feff633189f99264db1 < 42f0d3d81209654c08ffdde5a34b9b92d2645896 |
| Linux | Linux | a9020fde67a6eb77f8130feff633189f99264db1 < bbe7bd722bfaea36aab3da6cc60fb4a05c644643 |
| Linux | Linux | a9020fde67a6eb77f8130feff633189f99264db1 < 98b726ab5e2a4811e27c28e4d041f75bba147eab |
| Linux | Linux | a9020fde67a6eb77f8130feff633189f99264db1 < b8c56a3fc5d879c0928f207a756b0f067f06c6a8 |
| Linux | Linux | a9020fde67a6eb77f8130feff633189f99264db1 < 6931d21f87bc6d657f145798fad0bf077b82486c |
| Linux | Linux | 4.3 |
| linux | linux_kernel | 4.3 – 6.1.168 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |