Resource exhaustion in Oisf Suricata
CVE-2026-45769
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;)`.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.018 (78.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Oisf Suricata — versions < 7.0.16, >= 8.0.0, < 8.0.5
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-hg2g-r464-5593 (Third Party Advisory)
- forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 (Release Notes, Vendor Advisory)
- redmine.openinfosecfoundation.org/issues/8415 (Permissions Required)
Frequently asked questions
- What is CVE-2026-45769?
- CVE-2026-45769 is a high-severity vulnerability in Oisf Suricata, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-10.
- How severe is CVE-2026-45769?
- High severity. CVSS v3 base score is 7.5 out of 10.