medium5.3
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 DataCh…
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| S2OPC | through 1.7.3 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- 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