CVE-2026-45764

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{"bugzilla": {"description": "suricata: Suricata http2: protocol-change type confusion can lead to denial of service", "id": "2531669", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531669"}, "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-843", "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, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.", "A type confusion flaw was found in Suricata's HTTP/2 protocol parsing engine. When processing network traffic, Suricata fails to properly validate protocol state transitions during HTTP/2 frame handling. A remote, unauthenticated attacker could exploit this vulnerability by transmitting specially crafted HTTP/2 traffic through a network monitored by Suricata. Successful exploitation triggers an internal memory type confusion, causing the Suricata process to crash and resulting in a Denial of Service (DoS) for network intrusion detection and monitoring capabilities."], "mitigation": {"lang": "en:us", "value": "Disable HTTP/2 parsing within the Suricata configuration file by setting the HTTP/2 protocol parser status to disabled if HTTP/2 inspection is not strictly required by the environment."}, "name": "CVE-2026-45764", "public_date": "2026-09-10T21:14:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45764\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45764\nhttps://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315\nhttps://github.com/OISF/suricata/security/advisories/GHSA-5rvq-72r5-rqhr\nhttps://redmine.openinfosecfoundation.org/issues/8492"], "statement": "Type confusion in Suricata's HTTP/2 protocol engine allows remote, unauthenticated attackers to send crafted HTTP/2 traffic, triggering an engine crash and inducing a denial-of-service condition. Default Red Hat network monitoring deployments processing untrusted HTTP/2 ingress traffic expose the daemon to crash vectors without proper input filtering or protocol parsing isolation.", "threat_severity": "Important"}

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