Denial of Service Vulnerability in FreeBSD IPFW Packet Filtering System

CVE-2025-14769

What is CVE-2025-14769?

A potential Denial of Service (DoS) issue has been identified within the FreeBSD IPFW packet filtering system. This vulnerability arises when the tcp-setmss handler improperly manages packet data and may unwittingly allow incoming traffic after the packet data has been freed, leading to a NULL pointer dereference. Attackers can exploit this by sending specially crafted packets from a remote location, resulting in disruption of services on affected systems. Proper rule processing is essential to mitigate this risk.

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