CVE-2025-14769: Freebsd

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

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.

Affected products

• Freebsd Freebsd: version 13.5 only; version 14.3 only

Published 2026-03-09. Last modified 2026-06-17.