{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.8.3"
              }
            ],
            "source": "DESCRIPTION"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "435b881caab4e4303a23eb00b373eee3caf37903"
            }
          ],
          "repo": "https://github.com/openvpn/ovpn-dco-win",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "OpenVPN",
    "cwe_ids": [
      "CWE-122",
      "CWE-131",
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11604.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "2.0.0"
          },
          {
            "last_affected": "2.5.8"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).",
  "id": "CVE-2026-11604",
  "modified": "2026-07-08T05:36:42.852002856Z",
  "published": "2026-06-10T21:04:37.141Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://community.openvpn.net/Security%20Announcements/CVE-2026-11604"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11604.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11604"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/OpenVPN/ovpn-dco-win/releases"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
      "type": "CVSS_V4"
    }
  ]
}