What does BSOD 0xC6 (DRIVER_CAUGHT_MODIFYING_FREED_POOL) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: DRIVER_CAUGHT_MODIFYING_FREED_POOL means a driver accessed pool memory after that allocation had already been freed.

Could be also:
Constant	Type	OS
ERROR_INVALID_SEGDPL	Win32 error	Windows

Previous	Next
DRIVER_CORRUPTED_EXPOOL	TIMER_OR_DPC_INVALID

DRIVER_CAUGHT_MODIFYING_FREED_POOL

The DRIVER_CAUGHT_MODIFYING_FREED_POOL bug check has a value of 0x000000C6. This indicates that the driver attempted to access a freed memory pool.

DRIVER_CAUGHT_MODIFYING_FREED_POOL Parameters

Parameter	Description
1	Memory referenced
2	0: Read 1: Write
3	0: Kernel mode 1: User mode
4	Reserved

Remarks

The faulty component will be displayed in the current kernel stack. This driver should be either replaced or debugged.

Treat the referenced address as use-after-free evidence; inspect pool tags, Driver Verifier data, and the driver stack around the first write to freed memory.

References

Microsoft: Bug Check Code Reference

Looking for a different code? Search another status or error code.