CVE-2026-45765

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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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