CVE-2026-90782

S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()

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

Systerel · S2OPC

CVSS v4.0 VULNCHECK

6.0 MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

5.3 MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.57% chance of exploitation in the next 30 days, 46th percentile

Published

2026-09-13

Updated

2026-09-14

Proof-of-concept exploits (1)

• HarshRajSinghania/CVE-2026-90782-s2opc-status-clobber0★ · 2026-09-14

References

• CVE Record
• NVD entry

Related

• CVE-2017-0144
• CVE-2019-0703
• CVE-2020-0796
• CVE-2021-1675
• CVE-2022-38023
• CVE-2023-1545