A driver object is the kernel data structure that represents a loaded device driver. It stores the driver's dispatch table, entry point, reference count, and related state so the operating system can route I/O requests and manage the driver's lifetime.
What a driver object is
A driver object is the kernel’s internal representation of a loaded device driver. It lets the operating system keep track of the driver’s entry points, dispatch routines, and lifetime state so I/O requests can be routed correctly and the driver can be managed while it remains loaded.
What the driver object contains
At a practical level, the driver object is the kernel structure that ties the driver image to the operating system’s I/O model. Its fields describe how the kernel should call into the driver, what state the driver is in, and how long the object should remain valid while devices and requests depend on it.
Because the object is the kernel’s bookkeeping anchor, it sits at the boundary between code execution and operating-system control. The driver’s dispatch table determines which routines handle specific I/O major functions, while the entry point and reference count help the kernel initialise, retain, and retire the driver safely.
Why driver objects matter to system security
Driver objects matter because they are part of the trusted control plane inside the kernel. If the object is malformed, tampered with, or mismanaged, the consequences can extend beyond one driver to memory safety, request handling, and the operating system’s ability to trust what code is loaded and how it behaves.
In practice, security teams care about driver objects because kernel-mode components run with high privilege. A compromised or improperly handled driver object can support persistence, conceal malicious functionality, or create a path for privileged code execution if attacker-controlled code gains a place in the driver lifecycle.
Driver object lifecycle and trust boundary
The lifecycle of a driver object begins when the operating system loads the driver and ends when the kernel determines that no remaining references require it to stay resident. That lifecycle is important because it prevents premature unloading, preserves correct dispatching, and enforces the kernel’s view of whether the driver is still active.
This structure also reflects a trust boundary. The kernel assumes the driver object accurately describes a legitimate loaded driver, so integrity problems in that object can affect how I/O is processed and how much trust the system places in the driver’s execution path.
Related kernel and operational considerations
Driver objects are not managed in isolation. They are closely related to device objects, I/O request handling, and other kernel bookkeeping structures that together define how a driver participates in the operating system. When those relationships are inconsistent, troubleshooting often starts with understanding whether the driver was loaded correctly and whether its state matches the devices it is meant to service.
From an operational perspective, driver objects are one reason kernel drivers require careful testing, signing, and compatibility review. A driver that exposes unstable dispatch routines or incorrect lifetime management can produce system crashes, request failures, or hard-to-diagnose behaviour that looks like a general OS fault rather than a driver defect.
Risk and Threat Considerations
Driver objects are attractive targets because kernel structures combine high privilege with long-lived trust. If a malicious or vulnerable driver is loaded, the associated object can become part of a persistence or privilege-abuse path, and defects in its lifetime management can make detection and removal harder.
Failure mechanism: Attackers or faulty code can abuse the driver’s kernel registration and dispatch state to preserve execution, interfere with request handling, or keep a compromised component resident longer than intended.
Impact: The result can be kernel instability, persistence, hidden execution paths, or broader compromise of the operating system’s trusted control flow.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
MITRE ATT&CK addresses the attack surface, NIST SP 800-53 Rev 5 and CIS Controls v8 set the technical controls, and ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | SI-7 — Software, Firmware, and Information Integrity | Driver objects depend on trusted kernel code and object integrity. |
| CM-7 — Least Functionality | Loaded drivers expand privileged kernel functionality and attack surface. | |
| Recommendation — Validate kernel driver integrity before loading and monitor for tampering or replacement. Restrict driver loading to approved components and remove unnecessary kernel modules. | ||
| MITRE ATT&CK | T1547.006 — Kernel Modules and Extensions | Driver objects are the kernel structures used when malicious drivers persist in memory. |
| Recommendation — Hunt for unexpected kernel modules and correlate them with persistence activity. | ||
| CIS Controls v8 | CIS-4 — Secure Configuration of Enterprise Assets and Software | Kernel drivers require controlled configuration and approval to reduce exposure. |
| Recommendation — Harden driver-loading policy and verify only approved drivers are present. | ||
| ISO/IEC 27001:2022 | A.8.9 — Configuration management | Driver objects reflect controlled kernel configuration and lifecycle state. |
| Recommendation — Manage approved driver configuration and review changes to kernel-level components. | ||
Practitioner Guidance
What to watch for: Treat unexplained kernel crashes, unusual driver load behaviour, and inconsistent device handling as signals that the driver lifecycle or its object state deserves investigation. For analysts, the key question is whether the loaded driver matches what the kernel believes is present and active.
Governance implication: Driver objects reinforce why kernel-mode code should be tightly controlled, reviewed, and limited to trusted components. Any process that authorises drivers should assume that object integrity and lifecycle correctness are security-relevant, not just reliability concerns.
Related resources from NHI Mgmt Group
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- What breaks when asset systems record approval but not the approved object?
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Reviewed and updated by the NHIMG editorial team on November 9, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org