S2OPC through 1.7.3 NULL Pointer Dereference in alloc_notification_message_items()
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6epss 0.3%
from disclosure to weapon1 days
Published on NVDSep 13
1st PoC+1d
exploitation probability
0.3%top 75% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
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
Affected products
Systerel · S2OPCpublic PoCs found — 1
githubgithub.com/HarshRajSinghania/CVE-2026-90782-s2opc-status-clobber★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://gitlab.com/systerel/S2OPChttps://gitlab.com/systerel/S2OPC/-/blob/S2OPC_Toolkit_1.7.3/src/ClientServer/services/b2c/msg_subscription_publish_bs.c#L106-L147https://gitlab.com/systerel/S2OPC/-/commit/8848f051eed069b107ae7cb16a346d6f6386a8f5https://gitlab.com/systerel/S2OPC/-/issues/1815https://gitlab.com/systerel/S2OPC/-/merge_requests/1862https://www.vulncheck.com/advisories/s2opc-through-1.7.3-null-pointer-dereference-in-alloc-notification-message-items