Wazuh Database Synchronization Vulnerable to Stack-based Buffer Overflow via snprintf Integer Underflow

{
  "id": "581527e75777f4b790bf6b0b3f5905783fa146ee18308b632badb42e40228ace",
  "url": "https://osv.dev/vulnerability/CVE-2026-25772",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Wazuh Database Synchronization Vulnerable to Stack-based Buffer Overflow via snprintf Integer Underflow",
    "summary": "Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 4.4.0 and prior to version 4.14.3, a stack-based buffer overflow vulnerability exists in the Wazuh Database synchronization module (`wdb_delta_event.c`). The SQL query construction logic allows for an integer underflow when calculating the remaining buffer size. This occurs because the code incorrectly aggregates the return value of `snprintf`. If a specific database synchronization payload exceeds the size of the query buffer (2048 bytes), the size calculation wraps around to a massive integer, effectively removing bounds checking for subsequent writes. This allows an attacker to corrupt the stack, leading to a Denial of Service (DoS) or potentially RCE. Version 4.14.3 fixes the issue.",
    "evidence": "osv:CVE-2026-25772",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-25772",
      "aliases": [
        "CVE-2026-25772",
        "GHSA-h7vp-j34v-h6j5"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wazuh/wazuh",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2477e9fa50bc1424e834ac8401ce2450a5978e75"
                },
                {
                  "fixed": "b6b6e94a432f7a3e20d1eea1c58ebd01d2d30999"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.4.0"
                      },
                      {
                        "fixed": "4.14.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "cpe": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.4.0"
                      },
                      {
                        "fixed": "4.14.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25772.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.803067760Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25772.json",
        "https://github.com/wazuh/wazuh/security/advisories/GHSA-h7vp-j34v-h6j5",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-25772"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-121",
          "CWE-191"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25772.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-25772",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518404,
  "published_at": "2026-03-17T18:11:05.707+00:00"
}