Ivthandleinterrupt _hot_ Jun 2026

IvtHandleInterrupt (often referenced as IvtHandleInterrupt in driver code) is an internal function used by system drivers to manage hardware interrupts. It is most frequently encountered in the context of the DRIVER_VERIFIER_DMA_VIOLATION (Error code: 0x000000E6

In Windows Security, turning on Core Isolation/Memory Integrity can sometimes resolve configuration mismatches related to DMA protection.

nt!KiInterruptDispatchNoLock └── nt!KiInterruptSubDispatchNoLock └── nt!HalpIommuInterruptRoutine └── nt!IvtHandleInterrupt <-- The function enforcing DMA rules └── nt!KeBugCheckEx <-- Triggered BSOD Crash ivthandleinterrupt

To understand IvtHandleInterrupt , we first need to understand the basic mechanism by which a CPU handles interruptions. An interrupt is a signal that pauses the CPU's current task to address a more urgent event, such as a keystroke, a network packet, or a disk operation complete. The classic way to manage these is through the .

Identify source

) Blue Screen of Death (BSOD), where a driver fails to correctly handle Direct Memory Access (DMA) operations during an interrupt. Microsoft Learn Overview of the Error Driver Verifier

While you will never directly call this function from your code, understanding its purpose is crucial for diagnosing serious system crashes. When you see nt!IvtHandleInterrupt in a crash dump, it's a clear sign that the kernel was in the process of handling a DMA violation, and the root cause is almost always a driver bug or a hardware configuration issue. By recognizing this pattern, you can skip the guesswork and focus your troubleshooting on the actual culprit—the driver or device—rather than the Windows kernel itself. An interrupt is a signal that pauses the

The operation of ivthandleinterrupt can be broken down into several steps:

While the IVT defined the process, modern x86 and x64 systems use a more powerful and secure structure called the , which operates in protected mode . The IDT provides a more detailed "gateway" for interrupts, as each IDT entry contains not just the address but also: Microsoft Learn Overview of the Error Driver Verifier