---
id: CVE-2025-68191
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  udp_tunnel: use netdev_warn() instead of netdev_WARN()

  netdev_WARN() uses WARN/WARN_ON to print a backtrace along with
  file and line information
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  udp_tunnel: use netdev_warn() instead of netdev_WARN()

  netdev_WARN() uses WARN/WARN_ON to print a backtrace along with
  file and line information. In this case, udp_tun…
severity: none
published: '2025-12-16'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68191'
references:
  - url: 'https://git.kernel.org/stable/c/087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3c3b148bf8384c8a787753cf20abde1c5731f97f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/51b3033088f0420b19027e3d54cd989b6ebd987e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c018a87942bf1607aeebf8dba5a210ca9a09a0fd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dc2f650f7e6857bf384069c1a56b2937a1ee370d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00207
epssPercentile: 0.10009
ingestedAt: '2026-10-14T13:30:58.449Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

udp_tunnel: use netdev_warn() instead of netdev_WARN()

netdev_WARN() uses WARN/WARN_ON to print a backtrace along with
file and line information. In this case, udp_tunnel_nic_register()
returning an error is just a failed operation, not a kernel bug.

udp_tunnel_nic_register() can fail due to a memory allocation
failure (kzalloc() or udp_tunnel_nic_alloc()).
This is a normal runtime error and not a kernel bug.

Replace netdev_WARN() with netdev_warn() accordingly.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.