CVE-2026-90782

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://gitlab.com/systerel/S2OPC
https://gitlab.com/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c#L106-L147
https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5
https://gitlab.com/systerel/S2OPC/-/issues/1815
https://gitlab.com/systerel/S2OPC/-/merge_requests/1862
https://www.vulncheck.com/advisories/s2opc-through-1.7.3-null-pointer-dereference-in-alloc-notification-message-items
https://gitlab.com/systerel/S2OPC/-/issues/1815

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-13 13:16

Updated : 2026-09-14 18:20

NVD link : CVE-2026-90782

Mitre link : CVE-2026-90782

CVE.ORG link : CVE-2026-90782

JSON object : View

Products Affected

No product.

CWE

CWE-476

NULL Pointer Dereference

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