CVE-2026-82715 in Disk Array Driver for AIX
Summary
by MITRE • 10/14/2026
Insecure Temporary File vulnerability in Hitachi Disk Array Driver for AIX and Hitachi Disk Array Driver for Virtual I/O Server.
This issue affects Hitachi Disk Array Driver for AIX: from 01-00 before 01-23-/A; Hitachi Disk Array Driver for Virtual I/O Server: from 01-04 before 01-23-/A.
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Analysis
by VulDB Data Team • 10/14/2026
The vulnerability identified in the Hitachi Disk Array Driver for AIX and the Hitachi Disk Array Driver for Virtual I/O Server represents a classic insecure temporary file creation flaw, categorized under CWE-377: Insecure Temporary File. This specific weakness occurs when an application creates a temporary file without using secure methods to ensure that only the intended process can access or modify it during its lifecycle. In the context of system-level drivers such as those provided by Hitachi for AIX and Virtual I/O Server environments, these files are often used for storing intermediate data, configuration states, or logging information required for disk array operations. The affected versions, ranging from 01-00 up to but not including 01-23-/A on AIX systems and similarly scoped releases for the Virtual I/O Server driver, lack proper safeguards against race conditions or predictable file naming conventions that could be exploited by local attackers.
From a technical perspective, this vulnerability typically manifests when the software generates temporary files using static names or patterns in world-writable directories such as /tmp without employing atomic operations like mkstemp() or equivalent secure APIs. An attacker with local access to the system can predict the filename and create a symbolic link pointing to a sensitive file, such as /etc/passwd or a kernel module binary, before the driver creates its temporary file. When the vulnerable driver subsequently writes data to this path, it inadvertently overwrites the target of the symlink. This mechanism allows for arbitrary file write privileges, which can be leveraged to escalate local user privileges to root or system level. Alternatively, if the driver reads from a pre-existing maliciously placed temporary file, it may execute untrusted code or load compromised configuration data, leading to remote code execution potential depending on how the processed data is utilized within the kernel space.
The operational impact of this vulnerability is significant due to its location in storage management drivers that often run with high privileges. Successful exploitation could allow an authenticated local user to gain unauthorized access to critical system resources, modify disk array configurations, or disrupt availability by corrupting essential driver state files. In enterprise environments utilizing AIX and Virtual I/O Server architectures for virtualization and storage consolidation, such a breach compromises the integrity of the underlying infrastructure. Attackers may use this foothold to pivot into other parts of the network, exfiltrate sensitive data stored on the disk arrays, or establish persistence mechanisms that survive system reboots. The risk is particularly acute in multi-tenant environments where multiple users share access to the same operating system instance hosting the storage drivers.
Mitigation strategies primarily involve upgrading to patched versions of the Hitachi Disk Array Driver for AIX and Virtual I/O Server, specifically version 01-23-/A or later, which address these insecure file handling practices by implementing secure temporary file creation mechanisms. Until patches are applied, administrators should enforce strict permissions on directories where temporary files might be created, ensuring that only privileged processes can write to them if possible. Additionally, enabling mandatory access controls such as SELinux in enforcing mode can help restrict the actions of compromised processes, limiting the blast radius of any successful exploitation attempt. Regular auditing of file creation events and monitoring for unusual symlink activity in system directories can also aid in early detection of attempted exploits aligned with this CWE-377 pattern. This vulnerability aligns with ATT&CK techniques related to Privilege Escalation via Local Exploitation, emphasizing the need for rigorous patch management and secure coding standards in kernel-level software components.