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windbg-user-heap-corruption-investigation

Use when an app, service, or user-mode driver host heap fails or Application Verifier detects corruption; inspect history and bounds. Not for kernel pool corruption or ordinary OOM.

plugins/windbg/skills/windbg-user-heap-corruption-investigation/SKILL.md

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Last checked
Nov 5, 2026

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Repository last updated
Nov 3, 2026
License
MIT

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# Heap Corruption Investigation

**Load `windbg-diagnostic-method` first** if it is not already loaded in this
conversation, and apply it throughout for evidence ranking, hypothesis testing,
confidence calibration, independent review, and report validation. This skill
adds the bug-family-specific commands and evidence requirements.

## Detection and limits

Look for `STATUS_HEAP_CORRUPTION` (`0xC0000374`), Application Verifier stops,
or failures in heap allocate/free/reallocate paths in an application, service,
or user-mode driver host such as an UMDF host process. A crash inside the allocator
may be the first detection of an earlier bad write, not the faulty operation.
Distinguish corruption from allocation failure; for the latter use