OISF Suricata up to 7.0.13/8.0.2 DNP3 Parser resource consumption

Summaryinfo

A vulnerability labeled as problematic has been found in OISF Suricata up to 7.0.13/8.0.2. Affected by this issue is some unknown functionality of the component DNP3 Parser. The manipulation results in resource consumption. This vulnerability is known as CVE-2026-22259. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in OISF Suricata up to 7.0.13/8.0.2. Affected is an unknown part of the component DNP3 Parser. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. CVE summarizes:

Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, specially crafted traffic can cause Suricata to consume large amounts of memory while parsing DNP3 traffic. This can lead to the process slowing down and running out of memory, potentially leading to it getting killed by the OOM killer. Versions 8.0.3 or 7.0.14 contain a patch. As a workaround, disable the DNP3 parser in the suricata yaml (disabled by default).

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-22259 since 01/07/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 296924 (Linux Distros Unpatched Vulnerability : CVE-2026-22259), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 7.0.14 or 8.0.3 eliminates this vulnerability. Applying the patch 50cac2e2465ca211eabfa156623e585e9037bb7e is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (296924). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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
• 8.0.0
• 8.0.1
• 8.0.2

License

• open-source

Website

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

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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