CVE-2025-14769 ipfw denial of service
Remote attackers can cause a denial of service via crafted packets if the tcp-setmss directive is configured, leading to a null pointer dereference.
- 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-2025-14769?
CVE-2025-14769 is a high-severity vulnerability in Freebsd Freebsd, published on 9 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In some cases, the `tcp-setmss` handler may free the packet data and throw an error without halting the rule processing engine. A subsequent rule can then allow the traffic after the packet data is gone, resulting in a NULL pointer dereference.
Maliciously crafted packets sent from a remote host may result in a Denial of Service (DoS) if the `tcp-setmss` directive is used and a subsequent rule would allow the traffic to pass.
Weakness: CWE-476
Which versions are affected by CVE-2025-14769?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2025-14769?
No fix has been published for CVE-2025-14769 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-14769 being exploited?
There is no known exploitation of CVE-2025-14769 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-qx99-h65p-8xpj.