# GSD-2023-1000151: mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths

> Missing MMU notifier invocations in Linux kernel shmem/file collapse paths may cause memory management inconsistencies, requiring a kernel patch.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not stated
- **Attackable:** Not stated
- **Victim action needed:** Not stated
- **Fix available:** No
- **Published:** 17 Jan 2023

## What is GSD-2023-1000151?

GSD-2023-1000151 is a vulnerability in Kernel, published on 17 Jan 2023. 

### Official description

mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths

This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven.
This ID is fixed in Linux Kernel version v5.15.83 by commit 1a3f8c6cd29d9078cc81b29d39d0e9ae1d6a03c3, it was introduced in version v4.8 by commit f3f0e1d2150b2b99da2cbdfaad000089efe9bf30. For more details please see the references link.

## Which versions are affected by GSD-2023-1000151?

1 open source package ship an affected version, including Kernel.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `Kernel` | Linux | All versions | None |

## How do I fix GSD-2023-1000151?

No fix has been published for GSD-2023-1000151 yet. Limit exposure of the affected software until one is available.

## Is GSD-2023-1000151 being exploited?

There is no known exploitation of GSD-2023-1000151 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GSD-2023-1000151 and fix it if it is affected.

What it is: GSD-2023-1000151 is a vulnerability in Kernel, published on 17 Jan 2023. 
Exploitation: There is no known exploitation of GSD-2023-1000151 in the wild and no public exploit code.

Affected packages and fixed versions:
- Kernel (Linux): affected all versions; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/GSD-2023-1000151/ (Markdown: https://insights.sbomify.com/GSD-2023-1000151/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GSD-2023-1000151

---
From sbomify Insights: https://insights.sbomify.com/GSD-2023-1000151/
Summaries are generated and may contain mistakes; the official description above is the record.