Windows Server 2012 R2 – Kernel nonpaged pool leak from third-party driver – Fix and Prevention

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution — Primary Fix
7. Solution — Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Nonpaged pool rises steadily until services fail.

Environment & Reproduction

Observed after endpoint/network driver additions.

Get-Counter 'MemoryPool Nonpaged Bytes' -SampleInterval 10 -MaxSamples 12

Root Cause Analysis

Driver allocation path leaks nonpaged buffers.

Quick Triage

Estimate leak slope and recent module changes.

Step-by-Step Diagnosis

Use pool-tag analysis to isolate component.

Solution — Primary Fix

Apply vendor hotfix and reduce triggering pattern.

pnputil /add-driver C:DriversHotfix*.inf /install

Solution — Alternative Approaches

Use controlled service restarts as temporary mitigation.

Verification & Acceptance Criteria

Pool growth flattens and pressure alerts clear.

Rollback Plan

Revert to prior signed package if regression appears.

Prevention & Hardening

Monitor pool counters and enforce soak testing.

Related Errors & Cross-Refs

Can lead to bugcheck 0xC2/0x1A.

Related tutorial: View the step-by-step tutorial for Windows Server 2012 R2.

View all Windows Server 2012 R2 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Kernel memory leak diagnostic references.