CVE-2025-64330: Suricata is vulnerable to a heap buffer overflow on verdict

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-11-26 · updated 2026-10-18
Weakness: CWE-122

Description

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, a single byte read heap overflow when logging the verdict in eve.alert and eve.drop records can lead to crashes. This requires the per packet alert queue to be filled with alerts and then followed by a pass rule. This issue has been patched in versions 7.0.13 and 8.0.2. To reduce the likelihood of this issue occurring, the alert queue size a should be increased (packet-alert-max in suricata.yaml) if verdict is enabled.

Affected products

OISF suricata: before 7.0.13; from 8.0.0 before 8.0.2 — fixed in 7.0.13, 8.0.2

How to fix

Upgrade to a fixed version: OISF suricata 7.0.13, 8.0.2. Check the vendor advisory for mitigations.

References

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