What’s Vulnerable › Vulnerabilities

CVE-2024-37151: Suricata defrag: IP ID reuse can lead to policy bypass

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-07-11 · updated 2026-06-17
• Weakness: CWE-754

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Mishandling of multiple fragmented packets using the same IP ID value can lead to packet reassembly failure, which can lead to policy bypass. Upgrade to 7.0.6 or 6.0.20. When using af-packet, enable `defrag` to reduce the scope of the problem.

Affected products

• OISF suricata: from 6.0.0 before 6.0.20; from 7.0.0 before 7.0.6 — fixed in 6.0.20, 7.0.6

How to fix

Upgrade to a fixed version: OISF suricata 6.0.20, 7.0.6. Check the vendor advisory for mitigations.

References

• https://github.com/OISF/suricata/commit/9d5c4273cb7e5ca65f195f7361f0d848c85180e0
• https://github.com/OISF/suricata/commit/aab7f35c76721df19403a7c0c0025feae12f3b6b
• https://github.com/OISF/suricata/security/advisories/GHSA-qrp7-g66m-px24
• https://redmine.openinfosecfoundation.org/issues/7041
• https://redmine.openinfosecfoundation.org/issues/7042
• https://github.com/OISF/suricata/commit/9d5c4273cb7e5ca65f195f7361f0d848c85180e0
• https://github.com/OISF/suricata/commit/aab7f35c76721df19403a7c0c0025feae12f3b6b
• https://github.com/OISF/suricata/security/advisories/GHSA-qrp7-g66m-px24
• https://lists.debian.org/debian-lts-announce/2025/03/msg00029.html
• https://redmine.openinfosecfoundation.org/issues/7041
• https://redmine.openinfosecfoundation.org/issues/7042

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