---
id: CVE-2026-57224
title: >-
  Suricata is a network Intrusion Detection System, Intrusion Prevention System
  and Network Security Monitoring engine
summary: >-
  Suricata is a network Intrusion Detection System, Intrusion Prevention System
  and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the DHCP
  parser in rust/src/dhcp/dhcp.rs creates stateless transactions without
  recording their…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-770
vendor: OISF
product: suricata
affected:
  - 'suricata >= 8.0.0, < 8.0.6'
published: '2026-09-18'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:12:04.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57224'
references:
  - url: >-
      https://github.com/OISF/suricata/commit/3f86c56c800392ede5cfaf7a944a431fd8445c55
    label: security-advisories@github.com
  - url: >-
      https://github.com/OISF/suricata/commit/5af13e3eb06be0387da8703b611c5ce932245c59
    label: security-advisories@github.com
  - url: >-
      https://github.com/OISF/suricata/commit/bac8a69ca48c14582d39a244a87edad44751ebe1
    label: security-advisories@github.com
  - url: >-
      https://github.com/OISF/suricata/commit/ef035c7603293a10c5ad087e3d20b05f75236144
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/pull/15740'
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/releases/tag/suricata-8.0.6'
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/security/advisories/GHSA-m2vc-g65c-ph7m'
    label: security-advisories@github.com
  - url: 'https://redmine.openinfosecfoundation.org/issues/8621'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.00408
epssPercentile: 0.32368
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T20:22:12.045094Z'
ingestedAt: '2026-09-18T20:51:25.674Z'
---

## Overview

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the DHCP parser in rust/src/dhcp/dhcp.rs creates stateless transactions without recording their packet direction with AppLayerTxData::for_direction(), so a sensor that observes only one direction cannot mark the unseen direction inspected or free completed transactions. The RDP parser in rust/src/rdp/rdp.rs has the same direction-state defect. The per-flow transaction list can grow without bound and cleanup repeatedly scans it, causing increasing CPU and memory consumption and eventual denial of service. This issue is fixed in version 8.0.6.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.