---
id: CVE-2025-37998
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  openvswitch: Fix unsafe attribute parsing in output_userspace()

  This patch replaces the manual Netlink attribute iteration in
  output_userspace() with nla_for_each_nest…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  openvswitch: Fix unsafe attribute parsing in output_userspace()

  This patch replaces the manual Netlink attribute iteration in
  output_userspace() with nla_for_each_nest…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 3.3, < 5.4.294'
  - 'linux_kernel >= 5.5, < 5.10.238'
  - 'linux_kernel >= 5.11, < 5.15.183'
  - 'linux_kernel >= 5.16, < 6.1.139'
  - 'linux_kernel >= 6.2, < 6.6.91'
  - 'linux_kernel >= 6.7, < 6.12.29'
  - 'linux_kernel >= 6.13, < 6.14.7'
  - linux_kernel = 6.15
  - debian_linux = 11.0
patched:
  - linux_kernel 6.14.7
published: '2025-05-29'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:18:23.787'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-37998'
references:
  - url: 'https://git.kernel.org/stable/c/0236742bd959332181c1fcc41a05b7b709180501'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/06b4f110c79716c181a8c5da007c259807840232'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/47f7f00cf2fa3137d5c0416ef1a71bdf77901395'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4fa672cbce9c86c3efb8621df1ae580d47813430'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6712dc21506738f5f22b4f68b7c0d9e0df819dbd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6beb6835c1fbb3f676aebb51a5fee6b77fed9308'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bca8df998cce1fead8cbc69144862eadc2e34c87'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ec334aaab74705cc515205e1da3cb369fdfd93cd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://www.zerodayinitiative.com/advisories/ZDI-25-307/'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.00269
epssPercentile: 0.18921
zeroDay: true
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T21:46:40.143387Z'
ingestedAt: '2026-10-15T22:48:25.488Z'
---

## Overview

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

openvswitch: Fix unsafe attribute parsing in output_userspace()

This patch replaces the manual Netlink attribute iteration in
output_userspace() with nla_for_each_nested(), which ensures that only
well-formed attributes are processed.

## Affected

- `linux_kernel >= 3.3, < 5.4.294`
- `linux_kernel >= 5.5, < 5.10.238`
- `linux_kernel >= 5.11, < 5.15.183`
- `linux_kernel >= 5.16, < 6.1.139`
- `linux_kernel >= 6.2, < 6.6.91`
- `linux_kernel >= 6.7, < 6.12.29`
- `linux_kernel >= 6.13, < 6.14.7`
- `linux_kernel = 6.15`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.14.7`