What’s Vulnerable › Vulnerabilities

CVE-2026-45769: ikev2: unbounded client transform storage can lead to resource exhaustion

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-10 · updated 2026-09-16
• Weakness: CWE-400

Description

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,IKEv2 parser state could grow without bounds while storing client transforms. Repeated crafted UDP traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 fix the issue. Some workarounds are available. Disable IKE application-layer parsing if it is not needed. Alternatively, use a rule to bypass ike flows after the first packets like `alert ike any any -> any any (sid: 2; flow.pkts_toserver: > 256; bypass; noalert;)`.

Affected products

• OISF suricata: from 7.0.0 before 7.0.16; from 8.0.0 before 8.0.5 — fixed in 7.0.16, 8.0.5

How to fix

Upgrade to a fixed version: OISF suricata 7.0.16, 8.0.5. Check the vendor advisory for mitigations.

References

• https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315
• https://github.com/OISF/suricata/security/advisories/GHSA-hg2g-r464-5593
• https://redmine.openinfosecfoundation.org/issues/8415
• https://redmine.openinfosecfoundation.org/issues/8415

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