OISF Suricata up to 7.0.15/8.0.4 DNP3 Reassembly buffer overflow

Summaryinfo

A vulnerability categorized as critical has been discovered in OISF Suricata up to 7.0.15/8.0.4. The affected element is an unknown function of the component DNP3 Reassembly. Executing a manipulation can lead to buffer overflow. This vulnerability appears as CVE-2026-45765. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in OISF Suricata up to 7.0.15/8.0.4. It has been declared as critical. This vulnerability affects an unknown functionality of the component DNP3 Reassembly. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. CVE summarizes:

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, DNP3 reassembly could buffer data without sufficient parser-level bounds. Crafted DNP3 traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable DNP3 (which is not enabled by default) if it is not needed, and/or define a limited `stream.reassembly.depth` (0 or absent is unlimited).

The advisory is available at github.com. This vulnerability was named CVE-2026-45765 since 05/13/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 7.0.16 or 8.0.5 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• OISF

Name

• Suricata

Version

• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9
• 7.0.10
• 7.0.11
• 7.0.12
• 7.0.13
• 7.0.14
• 7.0.15
• 8.0.0
• 8.0.1
• 8.0.2
• 8.0.3
• 8.0.4

License

• open-source

Website

• Product: https://github.com/OISF/suricata/

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