OISF Suricata up to 7.0.13/8.0.2 use after free

Summaryinfo

A vulnerability, which was classified as critical, has been found in OISF Suricata up to 7.0.13/8.0.2. The affected element is an unknown function. The manipulation leads to use after free. This vulnerability is referenced as CVE-2026-22264. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in OISF Suricata up to 7.0.13/8.0.2 and classified as critical. This issue affects an unknown functionality. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Suricata is a network IDS, IPS and NSM engine. Prior to version 8.0.3 and 7.0.14, an unsigned integer overflow can lead to a heap use-after-free condition when generating excessive amounts of alerts for a single packet. Versions 8.0.3 and 7.0.14 contain a patch. As a workaround, do not run untrusted rulesets or run with less than 65536 signatures that can match on the same packet.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-22264 since 01/07/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 296935 (Linux Distros Unpatched Vulnerability : CVE-2026-22264), 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 549d7bf60616de8e54686a188196453b5b22f715 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 (296935). 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
• 8.0.0
• 8.0.1
• 8.0.2

License

• open-source

Website

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

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion