{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.7.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8848f051eed069b107ae7cb16a346d6f6386a8f5"
            }
          ],
          "repo": "https://gitlab.com/systerel/S2OPC",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90782.json"
  },
  "details": "S2OPC through 1.7.3 contains a null pointer dereference in msg_subscription_publish_bs__alloc_notification_message_items() where a failed allocation for DataChangeNotification is overwritten by a successful allocation for EventNotificationList. Attackers can trigger heap allocation failures on sessions with both data-change and event notifications to cause the server process to terminate.",
  "id": "CVE-2026-90782",
  "modified": "2026-09-16T03:30:20.580880585Z",
  "published": "2026-09-13T12:22:01.806Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90782.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90782"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/s2opc-through-1.7.3-null-pointer-dereference-in-alloc-notification-message-items"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.com/systerel/S2OPC/-/issues/1815"
    },
    {
      "type": "FIX",
      "url": "https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5"
    },
    {
      "type": "FIX",
      "url": "https://gitlab.com/systerel/S2OPC/-/merge_requests/1862"
    },
    {
      "type": "PACKAGE",
      "url": "https://gitlab.com/systerel/S2OPC"
    },
    {
      "type": "ARTICLE",
      "url": "https://gitlab.com/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c#L106-L147"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()"
}