CVE-2026-90782
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability47. percentile0.6%
ProductS2OPC
PublishedSep 13, 2026
First seenSep 13, 2026
Weakness typeCWE-476NULL pointer dereference
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Systerel S2OPC | v ≤ 1.7.3 | — |
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