{"id":"CVE-2026-57224","summary":"Suricata dhcp: unbounded transactions in unidirectional traffic can lead to resource exhaustion","details":"Suricata 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.","aliases":["GHSA-m2vc-g65c-ph7m"],"modified":"2026-09-19T11:45:28.609198602Z","published":"2026-09-18T20:08:46.402Z","related":["openSUSE-SU-2026:11308-1"],"database_specific":{"cwe_ids":["CWE-400","CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57224.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57224.json"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/3f86c56c800392ede5cfaf7a944a431fd8445c55"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/5af13e3eb06be0387da8703b611c5ce932245c59"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/bac8a69ca48c14582d39a244a87edad44751ebe1"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/ef035c7603293a10c5ad087e3d20b05f75236144"},{"type":"FIX","url":"https://github.com/OISF/suricata/pull/15740"},{"type":"WEB","url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6"},{"type":"ADVISORY","url":"https://github.com/OISF/suricata/security/advisories/GHSA-m2vc-g65c-ph7m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-57224"},{"type":"WEB","url":"https://redmine.openinfosecfoundation.org/issues/8621"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/oisf/suricata","events":[{"introduced":"9956286fb89f9cad9e9f95b99dc751f8666617b7"},{"fixed":"4c28cc1b4ac64f48efdca6ce3e09748227a04a7e"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"8.0.0"},{"fixed":"8.0.6"}]}}],"versions":["suricata-8.0.5","suricata-8.0.4","suricata-8.0.3","suricata-8.0.2","suricata-8.0.1","suricata-8.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57224.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}