# GSD-2021-1002391: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl

> A use-after-free vulnerability in the sata_fsl kernel driver allows local attackers with root privileges to cause a system crash or potentially escalate privileges.

- **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 Dec 2021

## What is GSD-2021-1002391?

GSD-2021-1002391 is an use after free vulnerability in Kernel, published on 19 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl

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 v4.14.257 by commit 325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1, it was introduced in version v2.6.24 by commit faf0b2e5afe7dae072d2715763c7f992b612b628. For more details please see the references link.

## Which versions are affected by GSD-2021-1002391?

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-2021-1002391?

No fix has been published for GSD-2021-1002391 yet. Limit exposure of the affected software until one is available.

## Is GSD-2021-1002391 being exploited?

There is no known exploitation of GSD-2021-1002391 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GSD-2021-1002391 and fix it if it is affected.

What it is: GSD-2021-1002391 is an use after free vulnerability in Kernel, published on 19 Dec 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-2021-1002391 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-2021-1002391/ (Markdown: https://insights.sbomify.com/GSD-2021-1002391/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GSD-2021-1002391

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From sbomify Insights: https://insights.sbomify.com/GSD-2021-1002391/
Summaries are generated and may contain mistakes; the official description above is the record.