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5.9 Medium

CVE-2026-45751 Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine

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, 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 and versions

Product Affected versions Fixed in
suricata 8.0 8.0.0 → < 8.0.5 8.0.5
suricata 7.0 earliest → < 7.0.16 7.0.16

Other CVEs of suricata

The 86 CVEs of suricata →
CVE-2026-94084 Suricata before 8.0.7 has an Http2ThreadMultiBuf use-after-free when a transaction is inspected by rules that use… 9.4 Critical CVE-2026-94083 Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state… 9.4 Critical CVE-2026-71855 Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine 5.9 Medium CVE-2026-71418 Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine 7.5 High
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