CVE-2026-90782

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.

Scoring

Severity

MEDIUM

CVSS base score

6

CVSS vector

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

EPSS probability

0.32%

CWE

CWE-476

Published

2026-09-13

Last modified

2026-09-14

Affected products

• Systerel S2OPC
• Systerel S2OPC

Weakness type

• CWE-476

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