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
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7606 records in the last 180 days details
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
To clipboard 

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              "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"
            }
          ],
          "source": {
            "advisory": "GHSA-hvvj-c8xx-9g35",
            "discovery": "UNKNOWN"
          },
          "title": "Suricata smb: some SMB flows can cause resource exhaustion"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-63448",
        "datePublished": "2026-09-18T20:20:01.185Z",
        "dateReserved": "2026-07-16T19:35:57.767Z",
        "dateUpdated": "2026-09-22T15:48:51.877Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

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