CVE-2026-67860
Description
A flaw was found in open62541, an open-source OPC UA (Open Platform Communications Unified Architecture) toolkit. This vulnerability is a heap-based buffer overflow occurring in the default HistoryRead path when the default history database uses a memory backend. An attacker could exploit this to cause a denial of service, making the system unavailable, or potentially achieve arbitrary code execution, gaining unauthorized control.
Statement
An Important heap-based buffer overflow flaw was found in open62541, affecting its default HistoryRead path when utilizing the memory backend for the history database. This vulnerability could allow a remote attacker to trigger a denial of service or potentially execute arbitrary code, impacting the availability and integrity of systems running the affected component in Red Hat community projects.
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of the product's implicit security policy. This can often be used to subvert any other security service.
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the product into an infinite loop.
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