CVE-2026-72405

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-72405

Key Details

CVE	CVE-2026-72405
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

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:

net: udp_tunnel: prevent double queueing in udp_tunnel_nic_device_sync

Yue Sun reported a use-after-free and debugobjects warning in

udp_tunnel_nic_device_sync_work() during concurrent device operations.

The workqueue core clears the internal pending bit before invoking the

worker. At that point, a concurrent thread can queue the work again.

When the already running worker eventually clears the work_pending flag

to 0, it mistakenly clears the flag for the newly queued instance.

udp_tunnel_nic_unregister() then observes work_pending as 0 and frees

the structure while the second work item is still active in the queue,

leading to UAF.

Fix this by returning early in udp_tunnel_nic_device_sync() if

work_pending is already set, preventing redundant work queueing. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-72405
CVE	https://www.cve.org/CVERecord?id=CVE-2026-72405

Source

Reference

NVD

CVE