CVE-2025-64330: oisf suricata Heap-based Buffer Overflow

Vulnerability summary

CVE-2025-64330 is a high (CVSS 7.5) Heap-based Buffer Overflow vulnerability in oisf suricata. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.5% of scored vulnerabilities.

Timeline

1. 26-11-2025
   PublishedVulnerability first disclosed.
2. 28-11-2025
   Last modifiedVulnerability information updated.

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.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.