CVE-2026-79837 in NonStop SQL
Summary
by MITRE • 10/15/2026
A vulnerability in HPE NonStop SQL/MX UDR SERVER may allow a crafted message to cause process termination, service disruption or memory corruption, resulting in undefined behavior.
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Analysis
by VulDB Data Team • 10/15/2026
The HighPoint Enterprise (HPE) NonStop SQL/MX Universal Data Relay Server contains a critical flaw that allows an attacker with network access to trigger severe system instability through the transmission of specially crafted messages. This vulnerability resides within the core communication handling logic of the UDR SERVER component, which is responsible for managing data relay operations between database nodes and clients in high-availability environments. The nature of this defect suggests a failure in input validation or buffer management when processing incoming network packets, leading to memory corruption or process termination upon receipt of malformed data structures.
From a technical perspective, the flaw likely involves improper handling of message boundaries or length fields within the protocol implementation. When an attacker sends a crafted message that exceeds expected limits or contains invalid structural elements, the server fails to sanitize or reject the input appropriately. This results in undefined behavior, which typically manifests as buffer overflows, heap corruption, or stack-based memory violations. Such conditions compromise the integrity of the application's memory space, potentially allowing for arbitrary code execution if the attacker can precisely control the overwritten memory regions, although the primary observed impact is service disruption and process crashes.
The operational impact of this vulnerability is significant due to the critical role that NonStop SQL/MX plays in enterprise data infrastructure. These systems are often deployed in mission-critical environments where high availability and continuous uptime are paramount. A successful exploit can lead to immediate denial of service by crashing the UDR SERVER process, thereby interrupting database connectivity for all connected clients. In more severe scenarios involving memory corruption, an attacker might achieve remote code execution with the privileges of the server process, potentially gaining full control over the underlying operating system and compromising sensitive data stored within the SQL/MX environment.
This vulnerability aligns with Common Weakness Enumeration (CWE) categories such as CWE-120 Buffer Copy without Checking Size of Input Classic Buffer Overflow or CWE-400 Uncontrolled Resource Consumption if the crash is primarily resource-based, though memory corruption points strongly toward buffer handling errors. In terms of the MITRE ATT&CK framework, this flaw facilitates Initial Access and potentially Privilege Escalation through techniques involving Exploitation for Remote Code Execution or Denial of Service via application crashes. Attackers can leverage this to disrupt business operations or as a stepping stone for deeper network penetration.
Mitigation strategies should focus on immediate patching by applying the latest vendor-released updates that address the input validation logic within the UDR SERVER component. Until patches are applied, organizations should restrict network access to the NonStop SQL/MX infrastructure using strict firewall rules and intrusion prevention systems configured to detect anomalous packet sizes or malformed protocol sequences associated with this vulnerability. Additionally, enabling detailed logging on the database servers can aid in identifying attempted exploitation activities by monitoring for repeated connection failures or process restarts triggered by specific client interactions.