CVE-2026-31678

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-31678

Key Details

CVE	CVE-2026-31678
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-31678
CVE	https://www.cve.org/CVERecord?id=CVE-2026-31678

Source

Reference

NVD

CVE