CVE-2025-23018 Security feature bypass in IPv6
Attackers can spoof and route arbitrary traffic via exposed interfaces due to missing source validation in IPv4-in-IPv6 and IPv6-in-IPv6 tunneling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-23018?
CVE-2025-23018 is a medium-severity vulnerability in IETF IPv6, published on 14 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.
Weakness: CWE-940
Which versions are affected by CVE-2025-23018?
It affects 1 product.
Products include Ietf Ipv6.
How do I fix CVE-2025-23018?
No fix has been published for CVE-2025-23018 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-23018 being exploited?
There is no known exploitation of CVE-2025-23018 in the wild and no public exploit code.
Other vulnerabilities in IETF IPv6
Sources
Also known as GHSA-mf23-wm84-g9x3.