CVE-2026-67863

EUVD-2026-53671
In open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback path. The issue occurs when UA_Subscription_localPublish continues to use the current UA_Notification after a callback invokes UA_Server_deleteMonitoredItem for the current local MonitoredItem. This allows a remote attacker to cause a denial of service.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 33.75%
Debian logo
Debian Releases
Debian Product
Codename
open62541
forky
vulnerable
sid
vulnerable
trixie
vulnerable
References
https://github.com/open62541/open62541/blob/v1.5.5/include/open62541/server.h
https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_monitoreditem.c
https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription.c
https://github.com/open62541/open62541/issues/8131
https://github.com/open62541/open62541/issues/8131