{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63448", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-16T19:35:57.767Z", "datePublished": "2026-09-18T20:20:01.185Z", "dateUpdated": "2026-09-18T20:20:01.185Z"}, "containers": {"cna": {"title": "Suricata smb: some SMB flows can cause resource exhaustion", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "lang": "en", "description": "CWE-400: Uncontrolled Resource Consumption", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-401", "lang": "en", "description": "CWE-401: Missing Release of Memory after Effective Lifetime", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-407", "lang": "en", "description": "CWE-407: Inefficient Algorithmic Complexity", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/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-hvvj-c8xx-9g35", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/OISF/suricata/security/advisories/GHSA-hvvj-c8xx-9g35"}, {"name": "https://github.com/OISF/suricata/commit/755d6c3061de4d7ba97f0ed31cdc17ab8cab4476", "tags": ["x_refsource_MISC"], "url": "https://github.com/OISF/suricata/commit/755d6c3061de4d7ba97f0ed31cdc17ab8cab4476"}, {"name": "https://github.com/OISF/suricata/commit/7ec9d72d28b9370712cf77a5b9d40d6b5db27cb4", "tags": ["x_refsource_MISC"], "url": "https://github.com/OISF/suricata/commit/7ec9d72d28b9370712cf77a5b9d40d6b5db27cb4"}, {"name": "https://github.com/OISF/suricata/commit/88adab8bd3d62912941647ab65032d5ec75c893a", "tags": ["x_refsource_MISC"], "url": "https://github.com/OISF/suricata/commit/88adab8bd3d62912941647ab65032d5ec75c893a"}, {"name": "https://github.com/OISF/suricata/commit/9a54a043516e644bb7b9d34117a91977f950a281", "tags": ["x_refsource_MISC"], "url": "https://github.com/OISF/suricata/commit/9a54a043516e644bb7b9d34117a91977f950a281"}, {"name": "https://github.com/OISF/suricata/commit/bc39274a638d1cca2391cfa4891c8b6c255ff9ce", "tags": ["x_refsource_MISC"], "url": "https://github.com/OISF/suricata/commit/bc39274a638d1cca2391cfa4891c8b6c255ff9ce"}, {"name": "https://github.com/OISF/suricata/commit/c8f68b0e4f9e721dca1c9ed6e08597c6964c7ac3", "tags": ["x_refsource_MISC"], "url": "https://github.com/OISF/suricata/commit/c8f68b0e4f9e721dca1c9ed6e08597c6964c7ac3"}, {"name": "https://github.com/OISF/suricata/releases/tag/suricata-7.0.17", "tags": ["x_refsource_MISC"], "url": "https://github.com/OISF/suricata/releases/tag/suricata-7.0.17"}, {"name": "https://github.com/OISF/suricata/releases/tag/suricata-8.0.6", "tags": ["x_refsource_MISC"], "url": "https://github.com/OISF/suricata/releases/tag/suricata-8.0.6"}, {"name": "https://redmine.openinfosecfoundation.org/issues/8629", "tags": ["x_refsource_MISC"], "url": "https://redmine.openinfosecfoundation.org/issues/8629"}], "affected": [{"vendor": "OISF", "product": "suricata", "versions": [{"version": ">= 8.0.0, < 8.0.6", "status": "affected"}, {"version": "< 7.0.17", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T20:20:01.185Z"}, "descriptions": [{"lang": "en", "value": "Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, the SMB parser can retain force-completed transactions on flows where Suricata sees payload in only one direction, including async-oneside flows, because cleanup waits for inspection in the unseen direction. The transaction creation paths in rust/src/smb can exceed the intended SMB_MAX_TX bound, and cleanup repeatedly scans the growing list. Sustained one-directional SMB traffic can therefore cause unbounded per-flow state and CPU and memory exhaustion. This issue is fixed in versions 8.0.6 and 7.0.17."}], "source": {"advisory": "GHSA-hvvj-c8xx-9g35", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "suricata", "vendor": "OISF", "versions": [{"status": "affected", "version": ">= 8.0.0, < 8.0.6"}, {"status": "affected", "version": "< 7.0.17"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, the SMB parser can retain force-completed transactions on flows where Suricata sees payload in only one direction, including async-oneside flows, because cleanup waits for inspection in the unseen direction. The transaction creation paths in rust/src/smb can exceed the intended SMB_MAX_TX bound, and cleanup repeatedly scans the growing list. Sustained one-directional SMB traffic can therefore cause unbounded per-flow state and CPU and memory exhaustion. This issue is fixed in versions 8.0.6 and 7.0.17."}], "id": "CVE-2026-63448", "lastModified": "2026-09-18T21:17:04.060", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-18T21:17:04.060", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/OISF/suricata/commit/755d6c3061de4d7ba97f0ed31cdc17ab8cab4476"}, {"source": "security-advisories@github.com", "url": "https://github.com/OISF/suricata/commit/7ec9d72d28b9370712cf77a5b9d40d6b5db27cb4"}, {"source": "security-advisories@github.com", "url": "https://github.com/OISF/suricata/commit/88adab8bd3d62912941647ab65032d5ec75c893a"}, {"source": "security-advisories@github.com", "url": "https://github.com/OISF/suricata/commit/9a54a043516e644bb7b9d34117a91977f950a281"}, {"source": "security-advisories@github.com", "url": "https://github.com/OISF/suricata/commit/bc39274a638d1cca2391cfa4891c8b6c255ff9ce"}, {"source": "security-advisories@github.com", "url": "https://github.com/OISF/suricata/commit/c8f68b0e4f9e721dca1c9ed6e08597c6964c7ac3"}, {"source": "security-advisories@github.com", "url": "https://github.com/OISF/suricata/releases/tag/suricata-7.0.17"}, {"source": "security-advisories@github.com", "url": "https://github.com/OISF/suricata/releases/tag/suricata-8.0.6"}, {"source": "security-advisories@github.com", "url": "https://github.com/OISF/suricata/security/advisories/GHSA-hvvj-c8xx-9g35"}, {"source": "security-advisories@github.com", "url": "https://redmine.openinfosecfoundation.org/issues/8629"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-401"}, {"lang": "en", "value": "CWE-407"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}