Suricata defrag: missing address-family check can lead to remote crash

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-45762
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-10 22:16:56 UTC
Updated2026-09-28 18:44:35 UTC
DescriptionSuricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, Suricata's IP defragmentation tracker lookup did not verify that an existing tracker used the same IP address family as the packet being processed. Under crafted fragmented IPv4/IPv6 traffic, an IPv6 fragment could be associated with an IPv4 defragmentation tracker. This can lead to a remote packet-triggered crash and denial of service when Suricata performs the relevant defragmentation. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, if using Suricata as an IDS with AF_PACKET, enabling AF_PACKET's `defrag` option may prevent Suricata from seeing such fragmented packets.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.004410000 probability, percentile 0.372490000 (date 2026-09-14)

Problem Types: CWE-843 | CWE-843 CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:N/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, < 8.0.5 Not specified
CNA OISF Suricata affected < 7.0.16 Not specified

References

ReferenceSourceLinkTags
github.com/OISF/suricata/security/advisories/GHSA-gv2j-f6jv-3878 [email protected] github.com Mitigation, Vendor Advisory
forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 [email protected] forum.suricata.io Release Notes
redmine.openinfosecfoundation.org/issues/8510 [email protected] redmine.openinfosecfoundation.org Permissions Required
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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