# GSD-2021-1001562: hwmon: (mlxreg-fan) Return non-zero value when fan current state is enforced from sysfs

> A logic error in the mlxreg-fan driver fails to return an error when fan state is enforced, potentially affecting system monitoring accuracy.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Oct 2021

## What is GSD-2021-1001562?

GSD-2021-1001562 is a vulnerability in Kernel, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

hwmon: (mlxreg-fan) Return non-zero value when fan current state is enforced from sysfs

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 v4.19.209 by commit 5c6e0bce647d9cb32a17d58ffa669b3421fcc6ca, it was introduced in version v4.19 by commit 65afb4c8e7e4e7e74b28efa1df62da503ca3e7a6. For more details please see the references link.

## Which versions are affected by GSD-2021-1001562?

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-2021-1001562?

No fix has been published for GSD-2021-1001562 yet. Limit exposure of the affected software until one is available.

## Is GSD-2021-1001562 being exploited?

There is no known exploitation of GSD-2021-1001562 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GSD-2021-1001562 and fix it if it is affected.

What it is: GSD-2021-1001562 is a vulnerability in Kernel, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of GSD-2021-1001562 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-2021-1001562/ (Markdown: https://insights.sbomify.com/GSD-2021-1001562/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GSD-2021-1001562

---
From sbomify Insights: https://insights.sbomify.com/GSD-2021-1001562/
Summaries are generated and may contain mistakes; the official description above is the record.