CVE-2026-63448
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.
How to fix
- oisf suricata7.0.17, 8.0.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| oisf suricata | v < 7.0.17, 8.0.0 ≤ v < 8.0.6 | 7.0.17, 8.0.6 |
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