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CVE-2026-63448 - Suricata smb: some SMB flows can cause resource exhaustion

CVE ID : CVE-2026-63448 Published : Sept. 18, 2026, 8:20 p. m. • 36 minutes ago Description : 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. Severity: 0.0 • NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...