OISF Suricata up to 7.0.14/8.0.3 KRB5 Buffering algorithmic complexity

Summaryinfo

A vulnerability was found in OISF Suricata up to 7.0.14/8.0.3. It has been classified as problematic. The affected element is an unknown function of the component KRB5 Buffering. This manipulation causes algorithmic complexity. This vulnerability is tracked as CVE-2026-31932. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in OISF Suricata up to 7.0.14/8.0.3. It has been declared as problematic. Affected by this vulnerability is an unknown code block of the component KRB5 Buffering. The manipulation with an unknown input leads to a algorithmic complexity vulnerability. The CWE definition for the vulnerability is CWE-407. An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached. 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, inefficiency in KRB5 buffering can lead to performance degradation. This issue has been patched in versions 7.0.15 and 8.0.4.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-31932 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. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 304884 (Linux Distros Unpatched Vulnerability : CVE-2026-31932), 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 (304884). If you want to get the best quality for vulnerability data then you always have to consider 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
• 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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