OISF Suricata up to 7.0.13/8.0.2 DCERPC resource consumption

Summaryinfo

A vulnerability classified as problematic has been found in OISF Suricata up to 7.0.13/8.0.2. This impacts an unknown function of the component DCERPC Handler. The manipulation leads to resource consumption. This vulnerability is referenced as CVE-2026-22258. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in OISF Suricata up to 7.0.13/8.0.2. This issue affects some unknown processing of the component DCERPC Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, crafted DCERPC traffic can cause Suricata to expand a buffer w/o limits, leading to memory exhaustion and the process getting killed. While reported for DCERPC over UDP, it is believed that DCERPC over TCP and SMB are also vulnerable. DCERPC/TCP in the default configuration should not be vulnerable as the default stream depth is limited to 1MiB. Versions 8.0.3 and 7.0.14 contain a patch. Some workarounds are available. For DCERPC/UDP, disable the parser. For DCERPC/TCP, the `stream.reassembly.depth` setting will limit the amount of data that can be buffered. For DCERPC/SMB, the `stream.reassembly.depth` can be used as well, but is set to unlimited by default. Imposing a limit here may lead to loss of visibility in SMB.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-22258 since 01/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 296932 (Linux Distros Unpatched Vulnerability : CVE-2026-22258), 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.

The vulnerability is also documented in the vulnerability database at Tenable (296932). Be aware that VulDB is the high quality source for vulnerability data.

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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Be aware that VulDB is the high quality source for vulnerability data.

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