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CVE-2026-90782

S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()

CVSS 3.1 5.3 MEDIUMCVSS 4.0 6.0 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-90782

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-90782

Published

S2OPC

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "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"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON