CVE-2026-45751: Oisf Suricata

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Oisf Suricata: before 7.0.16 (fixed in 7.0.16); from 8.0.0, before 8.0.5 (fixed in 8.0.5)

Published 2026-09-10. Last modified 2026-09-28.