CVE-2026-79838 in NonStop ODBC
Summary
by MITRE • 10/15/2026
A buffer overflow vulnerability in HPE NonStop ODBC/MX Services may cause memory corruption, resulting in application crash.
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Analysis
by VulDB Data Team • 10/15/2026
The identified vulnerability resides within the HPE NonStop ODBC and MX Services components, representing a critical security flaw that stems from improper handling of input data during processing operations. Specifically, this is a buffer overflow condition where the software fails to adequately validate or bound-check user-supplied information before copying it into fixed-size memory buffers. This technical deficiency allows an attacker to write more data than the allocated buffer can hold, leading directly to adjacent memory corruption. In systems utilizing HPE NonStop architecture, which relies heavily on high availability and continuous operation for mission-critical workloads, such low-level memory manipulation poses a severe risk to system integrity. The immediate operational consequence of this flaw is typically an application crash or termination due to the operating system detecting invalid memory access patterns. However, beyond simple denial-of-service scenarios where service availability is disrupted, buffer overflows historically present opportunities for arbitrary code execution if the attacker can precisely control the overwritten data and return addresses, potentially allowing full compromise of the underlying server environment.
From a classification perspective, this vulnerability aligns with CWE-120, which denotes Buffer Copy without Checking Size of Input Classic Overflow, indicating that the root cause is a failure to enforce strict length constraints on input parameters before memory allocation or copy operations occur. Furthermore, in terms of tactical behavior within an attack lifecycle, exploitation attempts would likely fall under MITRE ATT&CK techniques related to Initial Exploitation and Defense Evasion, as attackers often leverage such flaws to gain initial footholds or escalate privileges by manipulating process execution flow. The impact extends beyond immediate service disruption; it threatens the confidentiality, integrity, and availability of data processed through these ODBC connections, which are fundamental for database interactions in enterprise environments.
Mitigation strategies must prioritize both technical remediation and operational hardening. The primary corrective action involves applying vendor-provided patches or updates that address the specific buffer handling logic within the HPE NonStop ODBC/MX Services components. Organizations should verify their current software versions against official security advisories released by Hewlett Packard Enterprise to ensure they are running a version where this input validation flaw has been resolved. In addition to patching, implementing network-level controls such as firewalls and intrusion detection systems can help mitigate the risk of exploitation by restricting access to vulnerable services from untrusted networks or specific IP addresses until patches are deployed. Furthermore, enabling strict memory protection mechanisms like Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR), if supported by the underlying NonStop architecture configuration, can significantly raise the bar for successful exploitation even if a buffer overflow is triggered. Regular security assessments and code reviews focusing on input validation practices are also recommended to prevent similar vulnerabilities in future software updates or custom integrations involving these services.