Suricata dcerpc: quadratic complexity in dcerpc buffering

{
  "id": "16d5278f95fd428edcb885cc920304eb2d6b71599566a3d69499961258018fdc",
  "url": "https://osv.dev/vulnerability/CVE-2026-31937",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Suricata dcerpc: quadratic complexity in dcerpc buffering",
    "summary": "Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.",
    "evidence": "osv:CVE-2026-31937",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-31937",
      "aliases": [
        "CVE-2026-31937",
        "GHSA-86vg-w8vm-m3gg"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/oisf/suricata",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "e56afc6d522fbc8e124bf91bb77748b16fa43ae1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "7.0.15"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "7.0.15"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "suricata-7.0.14",
            "suricata-7.0.13",
            "suricata-7.0.12",
            "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-2026-31937.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.080890649Z",
      "provider": "osv",
      "references": [
        "https://redmine.openinfosecfoundation.org/issues/8304",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31937.json",
        "https://github.com/OISF/suricata/security/advisories/GHSA-86vg-w8vm-m3gg",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-31937"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-407"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31937.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-31937",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506645,
  "published_at": "2026-04-02T14:38:22.496+00:00"
}