CVE-2026-90782
S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()
- State
- Published
- Severity
- 6.0 Medium
- Published
- Sep 13, 2026
- Updated
- Sep 14, 2026
- Reserved
- Sep 13, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.0 Medium | 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 | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-476 NULL Pointer Dereference
Affected Products
| Product | Versions |
|---|---|
S2OPCSysterel |
|
References
- GitLab issue 1815issue-tracking
- Patch Commitpatch
- Status clobbering and NULL dereference at S2OPC_Toolkit_1.7.3technical-description
- https://gitlab.com/systerel/S2OPCproduct
- Merge request !1862patch
- VulnCheck Advisory: S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()third-party-advisory
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