CVE-2025-64330Network attack vector

Engine crash via out-of-bounds alert indexing

Published Nov 26, 2025 · Updated Nov 28, 2025

Heap buffer overflow in Suricata 7.0.0 through 7.0.12 and 8.0.0 through 8.0.1 allows remote attackers to crash the engine. EveAddVerdict reads the alert array at alerts.cnt after a full per-packet queue, so a following pass rule can select a one-past-end entry while writing EVE verdict data. Verdict logging must be enabled, which is not the default, and the packet must fill the alert queue before matching a pass rule; the bounded consequence is an engine crash.

CVSS severity7.5
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in Suricata 7.0.0 through 7.0.12 and 8.0.0 through 8.0.1 allows remote attackers to crash the engine. EveAddVerdict reads the alert array at alerts.cnt after a full per-packet queue, so a following pass rule can select a one-past-end entry while writing EVE verdict data. Verdict logging must be enabled, which is not the default, and the packet must fill the alert queue before matching a pass rule; the bounded consequence is an engine crash.

The record

CVE
CVE-2025-64330
Published
Nov 26, 2025
Updated
Nov 28, 2025
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-122, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.0.13
  2. Affected versionversion=< 8.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=< 7.0.13; version=< 8.0.2

Published CVSS scores

7.5Open Information Security FoundationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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