# GSD-2021-1001732: mac80211: fix use-after-free in CCMP/GCMP RX

> A use-after-free vulnerability in the Linux kernel's mac80211 module allows attackers to potentially execute code or cause a denial of service via wireless network traffic.

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

## What is GSD-2021-1001732?

GSD-2021-1001732 is an use after free 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

mac80211: fix use-after-free in CCMP/GCMP RX

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 v5.14.10 by commit 27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9, it was introduced in version v5.13 by commit bf30ca922a0c0176007e074b0acc77ed345e9990. For more details please see the references link.

## Which versions are affected by GSD-2021-1001732?

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-2021-1001732?

No fix has been published for GSD-2021-1001732 yet. Limit exposure of the affected software until one is available.

## Is GSD-2021-1001732 being exploited?

There is no known exploitation of GSD-2021-1001732 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GSD-2021-1001732 and fix it if it is affected.

What it is: GSD-2021-1001732 is an use after free 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-2021-1001732 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-2021-1001732/ (Markdown: https://insights.sbomify.com/GSD-2021-1001732/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GSD-2021-1001732

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From sbomify Insights: https://insights.sbomify.com/GSD-2021-1001732/
Summaries are generated and may contain mistakes; the official description above is the record.