windbg-user-heap-corruption-investigation SKILL.md skillA
windbg-user-heap-corruption-investigation from microsoft/win-dev-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add microsoft/win-dev-skills/windbg-user-heap-corruption-investigation@git:20261007.790b577Pins git:20261007.790b577 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- microsoft/win-dev-skills
- Path
plugins/windbg/skills/windbg-user-heap-corruption-investigation/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261007.790b577, committed Oct 7, 2026
- First version recorded
- Oct 7, 2026
- Size
- 5,320 bytes
- Repository stars
- 475
- License
- MIT
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.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 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 `windbg-user-virtual-memory-exhaustion`. Allocation/free history depends on how the process was instrumented and which pages were captured. A missing history is a limitation, not proof of a leak or use-after-free. ## Workflow ### 1. Decode the stop ```text .exr -1 .ecxr !analyze -v k ``` Record the stop reason, corrupted block, corruption address, and the operation that detected the damage. If a verifier stop frame has parameter/local symbols, …
Read the whole file at its exact version.
How to install
mdr add microsoft/win-dev-skills/windbg-user-heap-corruption-investigation@sha256:074409848cd46c35The line at the top of this page pins the label git:20261007.790b577, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_qszanftlgqtdl3wd)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Oct 7, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261007.790b577 latest | 2026-10-07 | 790b577 | 5,320 B | A | view · diff |
| git:20261007.e1050cd | 2026-10-07 | e1050cd | 5,191 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5320 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
microsoft/win-dev-skills · 475 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qszanftlgqtdl3wd GET https://markdownregistry.com/api/v1/resolve?ref=microsoft/win-dev-skills/windbg-user-heap-corruption-investigation GET https://markdownregistry.com/api/v1/blob/074409848cd46c35279f66de438400db12b9f3a35934cea04d1935deecee07b1
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.