---
id: CVE-2025-22005
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw().

  fib_check_nh_v6_gw() expects that fib6_nh_init() cleans up everything
  when it fails.

  Commit 7dd73168…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw().

  fib_check_nh_v6_gw() expects that fib6_nh_init() cleans up everything
  when it fails.

  Commit 7dd73168…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.3, < 5.4.292'
  - 'linux_kernel >= 5.5, < 5.10.236'
  - 'linux_kernel >= 5.16, < 6.1.132'
  - 'linux_kernel >= 6.2, < 6.6.85'
  - 'linux_kernel >= 6.7, < 6.12.21'
  - 'linux_kernel >= 6.13, < 6.13.9'
  - linux_kernel = 6.14
patched:
  - linux_kernel 6.13.9
published: '2025-04-03'
updated: '2026-07-14'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-22005'
references:
  - url: 'https://git.kernel.org/stable/c/119dcafe36795a15ae53351cbbd6177aaf94ffef'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/16267a5036173d0173377545b4b6021b081d0933'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1bd12dfc058e1e68759d313d7727d68dbc1b8964'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/29d91820184d5cbc70f3246d4911d96eaeb930d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/596a883c4ce2d2e9c175f25b98fed3a1f33fea38'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/77c41cdbe6bce476e08d3251c0d501feaf10a9f3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9740890ee20e01f99ff1dde84c63dcf089fabb98'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d3d5b4b5ae263c3225db363ba08b937e2e2b0380'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-019113.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00215
epssPercentile: 0.12129
ingestedAt: '2026-07-14T13:36:56.165Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2025-10-01T17:09:45.806528Z'
---

## Overview

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

ipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw().

fib_check_nh_v6_gw() expects that fib6_nh_init() cleans up everything
when it fails.

Commit 7dd73168e273 ("ipv6: Always allocate pcpu memory in a fib6_nh")
moved fib_nh_common_init() before alloc_percpu_gfp() within fib6_nh_init()
but forgot to add cleanup for fib6_nh->nh_common.nhc_pcpu_rth_output in
case it fails to allocate fib6_nh->rt6i_pcpu, resulting in memleak.

Let's call fib_nh_common_release() and clear nhc_pcpu_rth_output in the
error path.

Note that we can remove the fib6_nh_release() call in nh_create_ipv6()
later in net-next.git.

## Affected

- `linux_kernel >= 5.3, < 5.4.292`
- `linux_kernel >= 5.5, < 5.10.236`
- `linux_kernel >= 5.16, < 6.1.132`
- `linux_kernel >= 6.2, < 6.6.85`
- `linux_kernel >= 6.7, < 6.12.21`
- `linux_kernel >= 6.13, < 6.13.9`
- `linux_kernel = 6.14`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.13.9`