CVE-2026-79839 in NonStop ODBC MX
Summary
by MITRE • 10/15/2026
A buffer overflow vulnerability in HPE NonStop ODBC/MX Server may cause memory corruption, resulting in application crash.
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Analysis
by VulDB Data Team • 10/15/2026
The High Point Enterprise (HPE) NonStop ODBC/MX Server contains a critical buffer overflow vulnerability that poses significant risks to system stability and availability. This flaw resides within the core components responsible for handling Open Database Connectivity requests via the MX protocol interface. As an enterprise-grade database server, HPE NonStop is designed for high-availability environments where continuous operation is paramount. The presence of this memory corruption issue undermines these reliability guarantees by introducing a point of failure that can be triggered through standard interaction with the service.
The technical nature of this vulnerability involves improper bounds checking when processing specific input data sent to the ODBC/MX Server interface. When an attacker or malicious actor sends crafted requests containing oversized buffers, the application fails to validate the length of the incoming data against the allocated memory space. Consequently, excess data overwrites adjacent memory locations on the stack or heap. This buffer overflow leads directly to memory corruption, which disrupts the normal flow of execution within the server process. The immediate operational consequence is often a segmentation fault or an unhandled exception that causes the application to crash abruptly. In some scenarios, depending on the specific architecture and compiler optimizations, this corruption could potentially be leveraged for arbitrary code execution, although the primary documented impact remains denial of service through system instability.
From an industry standard perspective, this vulnerability aligns with CWE-120, which classifies buffer copy without checking size limits as a classic memory safety error. It also relates to CWE-787, indicating out-of-bounds write operations that corrupt heap or stack structures. In the context of the MITRE ATT&CK framework, this flaw facilitates techniques associated with Initial Access and Execution phases if exploited for code injection, but primarily it supports Denial of Service tactics by disrupting service availability. The lack of input validation is a fundamental design oversight that violates secure coding principles essential for network-facing services.
The operational impact of this vulnerability extends beyond simple application crashes. In an enterprise environment running HPE NonStop systems, the ODBC/MX Server often serves as a critical bridge between legacy applications and modern data sources. An abrupt crash can interrupt active transactions, lead to data inconsistency if rollback mechanisms are not fully robust, and require manual intervention or service restarts to restore functionality. For organizations relying on this infrastructure for mission-critical operations such as financial processing or healthcare records management, even brief periods of unavailability due to memory corruption events represent significant business risk. Furthermore, repeated exploitation attempts could degrade system performance through resource exhaustion before the crash occurs.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary defense is to apply vendor-provided patches or updates that address the specific buffer handling logic within the ODBC/MX Server component. Administrators should verify their current version against HPE’s security advisories to ensure they are running a fixed release. In environments where patching cannot be immediately implemented, network-level controls such as firewalls and intrusion prevention systems can be configured to restrict access to the MX protocol ports from untrusted networks. Additionally, implementing strict input validation at the application layer for any custom integrations using this server is advisable. Regular security audits focusing on memory safety and buffer management practices should also be conducted to prevent similar vulnerabilities in future development cycles or third-party components integrated into the stack.