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.
CVSS Metrics
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- network
- Complexity
- low
- Privileges
- none
- User Action
- none
- Scope
- unchanged
- Confidentiality
- none
- Integrity
- none
- Availability
- high
- Weaknesses
- CWE-476
Metadata
- Primary Vendor
- FREEBSD
- Published
- 3/9/2026
- Last Modified
- 3/17/2026
- Source
- NIST NVD
- Note: Verify all details with official vendor sources before applying patches.
Affected Products
freebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsd
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