Suricata dhcp: unbounded transactions in unidirectional traffic can lead to resource exhaustion

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-57224
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 20:17:17 UTC
Updated2026-09-28 18:36:45 UTC
DescriptionSuricata 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.004080000 probability, percentile 0.325280000 (date 2026-09-29)

Problem Types: CWE-400 | CWE-770 | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Oisf Suricata All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OISF Suricata affected >= 8.0.0, < 8.0.6 Not specified

References

ReferenceSourceLinkTags
github.com/OISF/suricata/commit/ef035c7603293a10c5ad087e3d20b05f75236144 [email protected] github.com Patch
github.com/OISF/suricata/commit/3f86c56c800392ede5cfaf7a944a431fd8445c55 [email protected] github.com Patch
github.com/OISF/suricata/commit/5af13e3eb06be0387da8703b611c5ce932245c59 [email protected] github.com Patch
github.com/OISF/suricata/releases/tag/suricata-8.0.6 [email protected] github.com Release Notes
github.com/OISF/suricata/security/advisories/GHSA-m2vc-g65c-ph7m [email protected] github.com Mitigation, Vendor Advisory
redmine.openinfosecfoundation.org/issues/8621 [email protected] redmine.openinfosecfoundation.org Permissions Required
github.com/OISF/suricata/pull/15740 [email protected] github.com Patch
github.com/OISF/suricata/commit/bac8a69ca48c14582d39a244a87edad44751ebe1 [email protected] github.com Patch
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