---
id: CVE-2025-40075
title: 'tcp_metrics: use dst_dev_net_rcu()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tcp_metrics: use dst_dev_net_rcu()

  Replace three dst_dev() with a lockdep enabled helper.
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <
    23261817e955ebeb91d7c5c667d09fa415eb88b4
  - >-
    Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <
    7012bea5622396b37566fbdc059f7c6a6c279d74
  - >-
    Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <
    4b89397807eb04986427c4786d065e9442834ad4
  - >-
    Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <
    07613a95326ebad2d1b88d883cd72546025a4f3e
  - >-
    Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 <
    50c127a69cd6285300931853b352a1918cfa180f
  - Linux 4.13
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T21:56:41.266469Z'
published: '2025-10-28'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T12:22:48.219Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-40075'
references:
  - url: 'https://git.kernel.org/stable/c/23261817e955ebeb91d7c5c667d09fa415eb88b4'
  - url: 'https://git.kernel.org/stable/c/7012bea5622396b37566fbdc059f7c6a6c279d74'
  - url: 'https://git.kernel.org/stable/c/4b89397807eb04986427c4786d065e9442834ad4'
  - url: 'https://git.kernel.org/stable/c/07613a95326ebad2d1b88d883cd72546025a4f3e'
  - url: 'https://git.kernel.org/stable/c/50c127a69cd6285300931853b352a1918cfa180f'
tags:
  - cve.org
epss: 0.00492
epssPercentile: 0.42306
ingestedAt: '2026-10-15T22:48:25.545Z'
---

## Overview

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

tcp_metrics: use dst_dev_net_rcu()

Replace three dst_dev() with a lockdep enabled helper.

## Affected

- `Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 < 23261817e955ebeb91d7c5c667d09fa415eb88b4`
- `Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 < 7012bea5622396b37566fbdc059f7c6a6c279d74`
- `Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 < 4b89397807eb04986427c4786d065e9442834ad4`
- `Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 < 07613a95326ebad2d1b88d883cd72546025a4f3e`
- `Linux >= 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 < 50c127a69cd6285300931853b352a1918cfa180f`
- `Linux 4.13`

## Remediation

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