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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-40173 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: net/ip6_tunnel: Prevent perpetual tunnel growth Similarly to ipv4 tunnel, ipv6 version updates dev->needed_headroom, too. While ipv4 tunnel headroom adjustment growth was limited in commit 5ae1e9922bbd ("net: ip_tunnel: prevent perpetual headroom growth"), ipv6 tunnel yet increases the headroom without any ceiling. Reflect ipv4 tunnel headroom adjustment limit on ipv6 version. Credits to Francesco Ruggeri, who was originally debugging this issue and wrote local Arista-specific patch and a reproducer.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/10fe967efe73c610e526ff7460581610633dee9c kernel.org
https://git.kernel.org/stable/c/11f6066af3bfb8149aa16c42c0b0c5ea5b199a94 kernel.org
https://git.kernel.org/stable/c/21f4d45eba0b2dcae5dbc9e5e0ad08735c993f16 kernel.org
https://git.kernel.org/stable/c/402b6985e872b4cf394bbbf33b503947a326a6cb kernel.org
https://git.kernel.org/stable/c/48294a67863c9cfa367abb66bbf0ef6548ae124f kernel.org
https://git.kernel.org/stable/c/566f8d5c8a443f2dd69c5460fdec43ed1c870c65 kernel.org
https://git.kernel.org/stable/c/b6eb25d870f1a8ae571fd3da2244b71df547824b kernel.org
https://git.kernel.org/stable/c/eeb4345488672584db4f8c20a1ae13a212ce31c4 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-40173
NVD Published Date:
11/12/2025
NVD Last Modified:
04/14/2026
Source:
kernel.org