What’s Vulnerable › Vulnerabilities

CVE-2026-46352: Suricata defrag: fragmented encapsulated traffic with fragments can lead to deadlock

• Severity: high (CVSS 7.5 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: 2026-09-16 · updated 2026-09-28
• Weakness: CWE-833

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, Suricata's IP defragmentation code could deadlock when processing fragmented traffic containing an encapsulated tunnel protocol whose payload is itself fragmented. Version 8.0.5 contains a fix. No known workarounds are available.

Affected products

• OISF suricata: from 8.0.0 before 8.0.5 — fixed in 8.0.5

How to fix

Upgrade to a fixed version: OISF suricata 8.0.5. Check the vendor advisory for mitigations.

References

• https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315
• https://github.com/OISF/suricata/security/advisories/GHSA-rc34-46x6-mxxm
• https://redmine.openinfosecfoundation.org/issues/8550

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