CVE-2024-32663Network attack vector

Denial of service via compressed header duplication

Published May 7, 2024 · Updated Nov 3, 2025

Uncontrolled resource consumption in Suricata 6.0.0 through 6.0.18 and 7.0.0 through 7.0.4 allows remote attackers to exhaust memory. The HTTP/2 HPACK parser copies previously seen header name and value vectors for each indexed reference, creating quadratic memory growth. Exposure requires the HTTP/2 parser to be enabled and the crafted stream to traverse monitored traffic; memory exhaustion can interrupt inspection.

CVSS severity7.5
High
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Uncontrolled resource consumption in Suricata 6.0.0 through 6.0.18 and 7.0.0 through 7.0.4 allows remote attackers to exhaust memory. The HTTP/2 HPACK parser copies previously seen header name and value vectors for each indexed reference, creating quadratic memory growth. Exposure requires the HTTP/2 parser to be enabled and the crafted stream to traverse monitored traffic; memory exhaustion can interrupt inspection.

The record

CVE
CVE-2024-32663
Published
May 7, 2024
Updated
Nov 3, 2025
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-770, CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=>= 6.0.0, <= 6.0.18
  2. Affected versionversion=>= 7.0.0, <= 7.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=>= 6.0.0, <= 6.0.18; version=>= 7.0.0, <= 7.0.4

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 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-770Allocation of Resources Without Limits or Throttling
CWE-400Uncontrolled Resource Consumption
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo