CVE-2024-23836Network attack vector

Denial of service via unbounded parser transactions

Published Feb 26, 2024 · Updated Feb 13, 2025

Resource exhaustion in Suricata before 6.0.16 and 7.0.0 through 7.0.2 allows remote attackers to cause a service hang via crafted traffic. Multiple application-layer parsers fail to cap live transactions or promptly release completed transaction state, so crafted flows consume disproportionate CPU and memory. No authentication or user interaction is required; sustained resource pressure severely slows packet inspection and can deny service.

CVSS severity7.5
High
EPSS probability1.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Suricata before 6.0.16 and 7.0.0 through 7.0.2 allows remote attackers to cause a service hang via crafted traffic. Multiple application-layer parsers fail to cap live transactions or promptly release completed transaction state, so crafted flows consume disproportionate CPU and memory. No authentication or user interaction is required; sustained resource pressure severely slows packet inspection and can deny service.

The record

CVE
CVE-2024-23836
Published
Feb 26, 2024
Updated
Feb 13, 2025
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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=< 6.0.16
  2. Affected versionversion=>= 7.0.0, < 7.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=< 6.0.16; version=>= 7.0.0, < 7.0.3

Published CVSS scores

7.5GitHub, Inc.CVSS: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 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-770Allocation of Resources Without Limits or Throttling
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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