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CVE-2026-90782NVD
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 Base Metrics
CVSS v3 (3.1)
MEDIUM 5.3
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4 (4.0)
MEDIUM 6
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
Weaknesses (CWE)
CWE-476 - NULL Pointer Dereference
Affected & Patched Versions
| Product | Affected Versions | Patched Version |
|---|---|---|
| Systerel S2OPC | 0 - <= 1.7.3 | 8848f051eed069b107ae7cb16a346d6f6386a8f5 |
References
- https://gitlab.com/systerel/S2OPC/-/issues/1815
- https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5
- 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
- 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