{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45765", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-13T07:45:21.250Z", "datePublished": "2026-09-10T21:25:22.867Z", "dateUpdated": "2026-09-11T17:41:52.667Z"}, "containers": {"cna": {"title": "Suricata dnp3: unbounded reassembly can lead to resource exhaustion", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/OISF/suricata/security/advisories/GHSA-m8x4-c78g-r4vj", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/OISF/suricata/security/advisories/GHSA-m8x4-c78g-r4vj"}, {"name": "https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315", "tags": ["x_refsource_MISC"], "url": "https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315"}, {"name": "https://redmine.openinfosecfoundation.org/issues/8460", "tags": ["x_refsource_MISC"], "url": "https://redmine.openinfosecfoundation.org/issues/8460"}], "affected": [{"vendor": "OISF", "product": "suricata", "versions": [{"version": ">= 8.0.0, < 8.0.5", "status": "affected"}, {"version": "< 7.0.16", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-10T21:25:22.867Z"}, "descriptions": [{"lang": "en", "value": "Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, DNP3 reassembly could buffer data without sufficient parser-level bounds. Crafted DNP3 traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable DNP3 (which is not enabled by default) if it is not needed, and/or define a limited `stream.reassembly.depth` (0 or absent is unlimited)."}], "source": {"advisory": "GHSA-m8x4-c78g-r4vj", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-11T17:41:01.835861Z", "id": "CVE-2026-45765", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-11T17:41:52.667Z"}}]}}

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{"bugzilla": {"description": "Suricata: Suricata: Denial of Service via unbounded DNP3 reassembly", "id": "2531990", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531990"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1284", "details": ["Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, DNP3 reassembly could buffer data without sufficient parser-level bounds. Crafted DNP3 traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable DNP3 (which is not enabled by default) if it is not needed, and/or define a limited `stream.reassembly.depth` (0 or absent is unlimited).", "A flaw was found in Suricata. DNP3 reassembly could buffer data without sufficient parser-level bounds. A remote attacker sending crafted DNP3 traffic may cause Suricata to consume excessive memory, potentially resulting in a denial of service."], "mitigation": {"lang": "en:us", "value": "Disable DNP3 parsing in the Suricata configuration file or configure a restricted maximum stream reassembly depth using the `stream.reassembly.depth` setting to cap memory utilization."}, "name": "CVE-2026-45765", "public_date": "2026-09-10T21:25:22Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45765\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45765\nhttps://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315\nhttps://github.com/OISF/suricata/security/advisories/GHSA-m8x4-c78g-r4vj\nhttps://redmine.openinfosecfoundation.org/issues/8460"], "statement": "Unbounded memory allocation during DNP3 stream reassembly in Suricata allows remote, unauthenticated attackers to send crafted DNP3 packet streams, causing excessive memory consumption and triggering a daemon crash. Default Red Hat deployments processing untrusted network streams with DNP3 inspection active expose the monitoring service to denial-of-service vectors without explicit parser depth boundaries.", "threat_severity": "Important"}

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