OISF Suricata up to 7.0.15/8.0.4 Inspection-Buffer Helper use after free

Summaryinfo

A vulnerability classified as critical was found in OISF Suricata up to 7.0.15/8.0.4. Impacted is an unknown function of the component Inspection-Buffer Helper. Executing a manipulation can lead to use after free. This vulnerability is registered as CVE-2026-45751. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in OISF Suricata up to 7.0.15/8.0.4. This vulnerability affects an unknown function of the component Inspection-Buffer Helper. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. 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, Suricata's inspection-buffer helper could leave an inspection pointer referencing freed memory after a chained transform caused the backing buffer to be reallocated. The issue is reached during a specific network traffic processing, and requires a specific but not malicious rule. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, avoid rules that chain `dotprefix` transform after another one.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-45751 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. There are neither technical details nor an exploit publicly available.

Upgrading to version 7.0.16 or 8.0.5 eliminates this vulnerability.

Once again VulDB remains the best 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
• 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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