What’s Vulnerable › Vulnerabilities

CVE-2024-38534: Suricata modbus: txs without responses are never freed

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% 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-770

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Crafted modbus traffic can lead to unlimited resource accumulation within a flow. Upgrade to 7.0.6. Set a limited stream.reassembly.depth to reduce the issue.

Affected products

• OISF suricata: before 7.0.6 — fixed in 7.0.6

How to fix

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

References

• https://github.com/OISF/suricata/commit/a753cdbe84caee3b66d0bf49b2712d29a50d67ae
• https://github.com/OISF/suricata/security/advisories/GHSA-59qg-h357-69fq
• https://redmine.openinfosecfoundation.org/issues/6987
• https://redmine.openinfosecfoundation.org/issues/6988
• https://github.com/OISF/suricata/commit/a753cdbe84caee3b66d0bf49b2712d29a50d67ae
• https://github.com/OISF/suricata/security/advisories/GHSA-59qg-h357-69fq
• https://redmine.openinfosecfoundation.org/issues/6987
• https://redmine.openinfosecfoundation.org/issues/6988

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