What’s Vulnerable › Vulnerabilities

CVE-2025-29916: Suricata datasets: ruleset declared settings can lead to resource starvation

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-10 · updated 2026-06-17
• Weakness: CWE-770

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Datasets declared in rules have an option to specify the `hashsize` to use. This size setting isn't properly limited, so the hash table allocation can be large. Untrusted rules can lead to large memory allocations, potentially leading to denial of service due to resource starvation. This vulnerability is fixed in 7.0.9.

Affected products

• OISF suricata: before 7.0.9 — fixed in 7.0.9

How to fix

Upgrade to a fixed version: OISF suricata 7.0.9. Check the vendor advisory for mitigations.

References

• https://github.com/OISF/suricata/commit/a7713db709b8a0be5fc5e5809ab58e9b14a16e85
• https://github.com/OISF/suricata/security/advisories/GHSA-27g3-pmvp-j9cv
• https://redmine.openinfosecfoundation.org/issues/7615

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