{"id":"CVE-2026-63448","summary":"Suricata smb: some SMB flows can cause resource exhaustion","details":"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.","aliases":["GHSA-hvvj-c8xx-9g35"],"modified":"2026-09-19T11:45:31.242733846Z","published":"2026-09-18T20:20:01.185Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-400","CWE-401","CWE-407"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63448.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63448.json"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/755d6c3061de4d7ba97f0ed31cdc17ab8cab4476"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/7ec9d72d28b9370712cf77a5b9d40d6b5db27cb4"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/88adab8bd3d62912941647ab65032d5ec75c893a"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/9a54a043516e644bb7b9d34117a91977f950a281"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/bc39274a638d1cca2391cfa4891c8b6c255ff9ce"},{"type":"FIX","url":"https://github.com/OISF/suricata/commit/c8f68b0e4f9e721dca1c9ed6e08597c6964c7ac3"},{"type":"WEB","url":"https://github.com/OISF/suricata/releases/tag/suricata-7.0.17"},{"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-hvvj-c8xx-9g35"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63448"},{"type":"WEB","url":"https://redmine.openinfosecfoundation.org/issues/8629"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/oisf/suricata","events":[{"introduced":"9956286fb89f9cad9e9f95b99dc751f8666617b7"},{"fixed":"4c28cc1b4ac64f48efdca6ce3e09748227a04a7e"},{"introduced":"0"},{"fixed":"f707f3208de8216e4eccada5c10e6edce460a82a"}],"database_specific":{"extracted_events":[{"introduced":"8.0.0"},{"fixed":"8.0.6"},{"introduced":"0"},{"fixed":"7.0.17"}],"source":"AFFECTED_FIELD"}}],"versions":["suricata-7.0.16","suricata-8.0.5","suricata-8.0.4","suricata-7.0.15","suricata-7.0.14","suricata-8.0.3","suricata-8.0.2","suricata-7.0.13","suricata-7.0.12","suricata-8.0.1","suricata-8.0.0","suricata-7.0.11","suricata-7.0.10","suricata-7.0.9","suricata-7.0.8","suricata-7.0.7","suricata-7.0.6","suricata-7.0.5","suricata-7.0.4","suricata-7.0.3","suricata-7.0.2","suricata-7.0.1","suricata-7.0.0","suricata-7.0.0-rc2","suricata-7.0.0-rc1","suricata-7.0.0-beta1","suricata-6.0.1","suricata-6.0.0","suricata-6.0.0-rc1","suricata-6.0.0-beta1","suricata-5.0.1","suricata-5.0.0","suricata-5.0.0-rc1","suricata-5.0.0-beta1","suricata-4.1.2","suricata-4.1.1","suricata-4.1.0","suricata-4.1.0-rc2","suricata-4.1.0-rc1","suricata-4.1.0-beta1","suricata-4.0.1","suricata-4.0.0","suricata-4.0.0-rc2","suricata-4.0.0-rc1","suricata-4.0.0-beta1","suricata-3.2.1","suricata-3.2","suricata-3.2RC1","suricata-3.2beta1","suricata-3.1.2","suricata-3.1.1","suricata-3.1","suricata-3.0.1","suricata-3.1RC1","suricata-3.0.1RC1","suricata-3.0","suricata-3.0RC3","suricata-3.0RC2","suricata-3.0RC1","suricata-2.1beta4","suricata-2.1beta3","suricata-2.1beta2","suricata-2.1beta1","suricata-2.0.2","suricata-2.0.1","suricata-2.0.1rc1","suricata-2.0","suricata-2.0rc3","suricata-2.0rc2","suricata-2.0rc1","suricata-2.0beta2","suricata-2.0beta1","suricata-1.4","suricata-1.4rc1","suricata-1.4beta3","suricata-1.4beta2","suricata-1.4beta1","suricata-1.3.1","suricata-1.3","suricata-1.3rc1","suricata-1.3beta2","suricata-1.3beta1","suricata-1.2.1","suricata-1.2","suricata-1.2rc1","suricata-1.2beta1","suricata-1.1","suricata-1.1rc1","suricata-1.1beta3","suricata-1.1beta2","suricata-1.1beta1","suricata-1.0.2","suricata-1.0.1","suricata-1.0.0","suricata-0.8.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63448.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}