CVE-2024-55627Network attack vector

Service crash via streaming-buffer size underflow

Published Jan 6, 2025 · Updated Jan 6, 2025

Heap-based buffer overflow in Suricata before 7.0.8 allows remote attackers to crash the engine with a crafted TCP stream. StreamingBufferSlideToOffsetWithRegions can request region growth when mem_size is smaller than the current buffer, so unsigned subtraction wraps and memset zero-fills an excessive length. No authentication or user interaction is required, but the crafted stream must reach Suricata's TCP reassembly path; the documented consequence is a process crash and service interruption.

CVSS severity5.9
Medium
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Suricata before 7.0.8 allows remote attackers to crash the engine with a crafted TCP stream. StreamingBufferSlideToOffsetWithRegions can request region growth when mem_size is smaller than the current buffer, so unsigned subtraction wraps and memset zero-fills an excessive length. No authentication or user interaction is required, but the crafted stream must reach Suricata's TCP reassembly path; the documented consequence is a process crash and service interruption.

The record

CVE
CVE-2024-55627
Published
Jan 6, 2025
Updated
Jan 6, 2025
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-191, CWE-122, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Jan 6, 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=< 7.0.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=< 7.0.8

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.9GitHub, Inc.CVSS:3.1/AV:N/AC:H/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-191Integer Underflow (Wrap or Wraparound)
CWE-122Heap-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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