OISF Suricata up to 7.0.14/8.0.3 HTTP/2 CONTINUATION Frame resource consumption

Summaryinfo

A vulnerability marked as problematic has been reported in OISF Suricata up to 7.0.14/8.0.3. Affected by this issue is some unknown functionality of the component HTTP2 CONTINUATION Frame Handler. This manipulation causes resource consumption. This vulnerability appears as CVE-2026-31935. The attack may be initiated remotely. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in OISF Suricata up to 7.0.14/8.0.3 and classified as problematic. Affected by this vulnerability is an unknown code of the component HTTP2 CONTINUATION Frame Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, flooding of craft HTTP2 continuation frames can lead to memory exhaustion, usually resulting in the Suricata process being shut down by the operating system. This issue has been patched in versions 7.0.15 and 8.0.4.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-31935 since 03/10/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 304876 (Linux Distros Unpatched Vulnerability : CVE-2026-31935), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 7.0.15 or 8.0.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (304876). Statistical analysis made it clear that VulDB provides the best quality 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
• 7.0.14
• 8.0.0
• 8.0.1
• 8.0.2
• 8.0.3

License

• open-source

Website

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

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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