Vulnerability Description
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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://gitlab.com/systerel/S2OPC
- https://gitlab.com/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/se
- https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a
- 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-dereferenc
- https://gitlab.com/systerel/S2OPC/-/issues/1815
FAQ
What is CVE-2026-90782?
CVE-2026-90782 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 succ...
How severe is CVE-2026-90782?
CVE-2026-90782 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-90782?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.