{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90782",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-09-13T12:01:31.544Z",
        "datePublished": "2026-09-13T12:22:01.806Z",
        "dateUpdated": "2026-09-13T12:22:01.806Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
                "shortName": "VulnCheck",
                "dateUpdated": "2026-09-13T12:22:01.806Z"
            },
            "datePublic": "2026-08-16T00:00:00.000Z",
            "title": "S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "NULL Pointer Dereference",
                            "cweId": "CWE-476",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "vendor": "Systerel",
                    "product": "S2OPC",
                    "repo": "https://gitlab.com/systerel/S2OPC",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "1.7.3",
                            "status": "affected",
                            "versionType": "custom"
                        },
                        {
                            "version": "8848f051eed069b107ae7cb16a346d6f6386a8f5",
                            "status": "unaffected",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "HIGH",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM"
                    }
                },
                {
                    "format": "CVSS",
                    "cvssV4_0": {
                        "version": "4.0",
                        "vectorString": "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",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 6,
                        "baseSeverity": "MEDIUM"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://gitlab.com/systerel/S2OPC/-/issues/1815",
                    "tags": [
                        "issue-tracking"
                    ],
                    "name": "GitLab issue 1815"
                },
                {
                    "url": "https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5",
                    "tags": [
                        "patch"
                    ],
                    "name": "Patch Commit"
                },
                {
                    "url": "https://gitlab.com/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c#L106-L147",
                    "tags": [
                        "technical-description"
                    ],
                    "name": "Status clobbering and NULL dereference at S2OPC_Toolkit_1.7.3"
                },
                {
                    "url": "https://gitlab.com/systerel/S2OPC",
                    "tags": [
                        "product"
                    ]
                },
                {
                    "url": "https://gitlab.com/systerel/S2OPC/-/merge_requests/1862",
                    "tags": [
                        "patch"
                    ],
                    "name": "Merge request !1862"
                },
                {
                    "name": "VulnCheck Advisory: S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.vulncheck.com/advisories/s2opc-through-1.7.3-null-pointer-dereference-in-alloc-notification-message-items"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Harsh Raj Singhania",
                    "type": "finder"
                }
            ],
            "x_generator": {
                "engine": "vulncheck-endgame"
            }
        }
    }
}