CVE-2026-90782 S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()
Attackers can cause a denial of service in S2OPC servers by triggering heap allocation failures during notification processing.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90782?
CVE-2026-90782 is a medium-severity vulnerability in Systerel S2OPC, published on 13 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-476
Which versions are affected by CVE-2026-90782?
How do I fix CVE-2026-90782?
No fix has been published for CVE-2026-90782 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-90782 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90782 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-wj27-rfm4-9hp4.