CVE-2026-73795 in NonStop TMF Auditread2
Summary
by MITRE • 10/14/2026
A security vulnerability in HPE NonStop TMF Auditread2 can cause Denial of Service.
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Analysis
by VulDB Data Team • 10/14/2026
The identified vulnerability resides within the TMF Auditread2 component of Hewlett Packard Enterprise (HPE) NonStop systems, a critical infrastructure platform widely utilized for high-availability transaction processing and mission-critical applications in sectors such as finance, healthcare, and telecommunications. This specific flaw presents a significant risk to system stability by enabling a Denial of Service condition. The TMF Auditread2 utility is responsible for reading audit trail records from the NonStop file system, providing essential visibility into system activities for compliance and security monitoring purposes. When this component encounters malformed or specifically crafted input data during its parsing routine, it fails to handle the anomaly gracefully, leading to a crash of the associated process or potentially affecting broader system resources depending on the isolation level configured within the environment.
From a technical perspective, this vulnerability is characteristic of improper input validation and error handling mechanisms often found in legacy systems that have undergone incremental updates over decades without complete architectural refactoring. The flaw likely stems from an absence of rigorous boundary checks when processing audit record structures or file offsets. An attacker who gains access to the system, whether through local execution privileges or via a network-exposed service that interacts with TMF logs, can exploit this weakness by supplying data that triggers the internal error state. This could involve sending excessively large records, malformed binary sequences, or specific control characters that confuse the parser logic within Auditread2. The resulting failure does not typically allow for arbitrary code execution but instead results in a termination of the audit reading process, which disrupts the continuous flow of security logging and monitoring capabilities essential for detecting other malicious activities.
The operational impact of this vulnerability extends beyond the immediate loss of functionality for the TMF subsystem. In NonStop environments, where high availability is paramount, the unexpected termination of core auditing processes can lead to gaps in audit trails, compromising an organization's ability to maintain regulatory compliance with standards such as PCI DSS or HIPAA which mandate comprehensive logging and monitoring. Furthermore, if the vulnerability causes resource leaks or hangs that affect shared system resources, it could degrade performance for other critical applications running on the same node. For security operations teams, this represents a blind spot; an attacker might exploit this Denial of Service to mask their own activities by disrupting the very tools designed to detect them, thereby facilitating persistence and lateral movement within the network without triggering immediate alerts based on audit log anomalies.
In terms of industry classification frameworks, this vulnerability aligns with CWE-20 Improper Input Validation and potentially CWE-400 Resource Exhaustion if it leads to resource depletion conditions that impact system availability. Within the MITRE ATT&CK framework, this flaw supports techniques related to Impact, specifically Denial of Service (T1499), as well as Defense Evasion through Log Deletion or Obfuscation (T1070) by disrupting logging mechanisms. The exploitation scenario typically falls under Local Privilege Escalation if the attacker requires local access to trigger the flaw against system-level audit processes, highlighting the importance of strict access controls even for internal services.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. HPE has likely released patches or updates that address the input validation logic within TMF Auditread2; organizations should prioritize applying these vendor-supplied fixes to all affected NonStop nodes as part of their standard patch management cycle. In addition to software updates, administrators should implement strict access controls to limit which users and processes can invoke audit reading utilities or interact with sensitive log files. Network segmentation should be enforced to ensure that services requiring TMF data are isolated from untrusted networks. Furthermore, deploying intrusion detection systems capable of identifying anomalous patterns in file system interactions may help detect attempted exploitation before a crash occurs. Regular audits of the NonStop environment configuration and continuous monitoring for unexpected process terminations related to audit functions will enhance resilience against this specific threat vector while maintaining the integrity of security observability capabilities.