CVE-2024-45796: Suricata defrag: off by one can lead to policy bypass

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-10-16 · updated 2026-06-17
Weakness: CWE-193

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to version 7.0.7, a logic error during fragment reassembly can lead to failed reassembly for valid traffic. An attacker could craft packets to trigger this behavior.This issue has been addressed in 7.0.7.

Affected products

OISF suricata: before 7.0.7 — fixed in 7.0.7

How to fix

Upgrade to a fixed version: OISF suricata 7.0.7. Check the vendor advisory for mitigations.

References

https://github.com/OISF/suricata/security/advisories/GHSA-mf6r-3xp2-v7xg
https://redmine.openinfosecfoundation.org/issues/7067
https://lists.debian.org/debian-lts-announce/2025/03/msg00029.html

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