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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896	Patch
https://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c	Patch
https://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eab	Patch
https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc	Patch
https://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8	Patch
https://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc3::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc4::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc5::::::

History

No history.

Information

Published : 2026-04-25 09:16

Updated : 2026-06-17 10:34

NVD link : CVE-2026-31678

Mitre link : CVE-2026-31678

CVE.ORG link : CVE-2026-31678

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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