CVE-2025-64344Network attack vector

Unauthenticated crash via variable-length stack allocation

Published Nov 26, 2025 · Updated Nov 28, 2025

Stack-based buffer overflow in Suricata before 7.0.13 and 8.0.0 through 8.0.1 allows remote attackers to crash the engine. LuaPushStringBuffer rounds an input length, allocates a correspondingly sized variable-length stack buffer, and copies the input before calling lua_pushlstring. Exploitation requires enabled Lua rules or output scripts to process a large attacker-controlled traffic buffer, causing a process crash without data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Suricata before 7.0.13 and 8.0.0 through 8.0.1 allows remote attackers to crash the engine. LuaPushStringBuffer rounds an input length, allocates a correspondingly sized variable-length stack buffer, and copies the input before calling lua_pushlstring. Exploitation requires enabled Lua rules or output scripts to process a large attacker-controlled traffic buffer, causing a process crash without data disclosure or modification.

The record

CVE
CVE-2025-64344
Published
Nov 26, 2025
Updated
Nov 28, 2025
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-121, T1499
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

7.5GitHub CNACVSS: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499Endpoint Denial of Service

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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