# CVE-2025-22005

## Summary

- **CVE ID:** CVE-2025-22005
- **Severity:** MEDIUM
- **CVSS Score:** 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** N/A
- **Published:** Apr 3, 2025
- **Last Modified:** Sep 8, 2026

## Description

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 Products

- Linux — Linux (7dd73168e273938b9e9bb42ca51b0c27d807992b)
- Linux — Linux (5.3)
- Linux — Linux (0)
- Linux — Linux (5.4.292)
- Linux — Linux (5.10.236)
- Linux — Linux (5.15.180)
- Linux — Linux (6.1.132)
- Linux — Linux (6.6.85)
- Linux — Linux (6.12.21)
- Linux — Linux (6.13.9)
- Linux — Linux (6.14)

## References

- [CNA](https://git.kernel.org/stable/c/16267a5036173d0173377545b4b6021b081d0933)
- [CNA](https://git.kernel.org/stable/c/1bd12dfc058e1e68759d313d7727d68dbc1b8964)
- [CNA](https://git.kernel.org/stable/c/596a883c4ce2d2e9c175f25b98fed3a1f33fea38)
- [CNA](https://git.kernel.org/stable/c/77c41cdbe6bce476e08d3251c0d501feaf10a9f3)
- [CNA](https://git.kernel.org/stable/c/119dcafe36795a15ae53351cbbd6177aaf94ffef)
- [CNA](https://git.kernel.org/stable/c/29d91820184d5cbc70f3246d4911d96eaeb930d6)
- [CNA](https://git.kernel.org/stable/c/d3d5b4b5ae263c3225db363ba08b937e2e2b0380)
- [CNA](https://git.kernel.org/stable/c/9740890ee20e01f99ff1dde84c63dcf089fabb98)
- [CVE](https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html)
- [CVE](https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-019113.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.21%
- **EPSS Percentile:** 12.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._