CVE-2026-63448 (GCVE-0-2026-63448)

Vulnerability from cvelistv5 – Published: 2026-09-18 20:20 – Updated: 2026-09-22 15:48
VLAI
Title
Suricata smb: some SMB flows can cause resource exhaustion
Summary
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
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 15:48 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-401 - Missing Release of Memory after Effective Lifetime
  • CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
Vendor Product Version CPE status
OISF suricata Affected: >= 8.0.0, < 8.0.6
Affected: < 7.0.17
guessed Create a notification for this product.
Show details on NVD website
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