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.

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00403.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/OISF/suricata/commit/3f86c56c800392ede5cfaf7a944a431fd8445c55 cve-icon cve-icon
https://github.com/OISF/suricata/commit/5af13e3eb06be0387da8703b611c5ce932245c59 cve-icon cve-icon
https://github.com/OISF/suricata/commit/bac8a69ca48c14582d39a244a87edad44751ebe1 cve-icon cve-icon
https://github.com/OISF/suricata/commit/ef035c7603293a10c5ad087e3d20b05f75236144 cve-icon cve-icon
https://github.com/OISF/suricata/pull/15740 cve-icon cve-icon
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6 cve-icon cve-icon
https://github.com/OISF/suricata/security/advisories/GHSA-m2vc-g65c-ph7m cve-icon cve-icon
https://redmine.openinfosecfoundation.org/issues/8621 cve-icon cve-icon
History

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Suricata dhcp: unbounded transactions in unidirectional traffic can lead to resource exhaustion
Weaknesses CWE-400
CWE-770
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-18T20:22:23.977Z

Reserved: 2026-06-24T02:21:33.811Z

Link: CVE-2026-57224

cve-icon Vulnrichment

Updated: 2026-09-18T20:22:19.203Z

cve-icon NVD

Status : Received

Published: 2026-09-18T20:17:17.780

Modified: 2026-09-18T21:17:00.960

Link: CVE-2026-57224

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-19T11:15:14Z

Weaknesses