# GSD-2021-1001995: comedi: vmk80xx: fix transfer-buffer overflows

> Buffer overflow in the vmk80xx comedi driver allows potential code execution or denial of service, requiring kernel patching.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not stated
- **Attackable:** Local or same network only
- **Victim action needed:** Not stated
- **Fix available:** No
- **Published:** 14 Nov 2021

## What is GSD-2021-1001995?

GSD-2021-1001995 is a memory corruption vulnerability in Kernel, published on 14 Nov 2021. It can only be exploited from the same machine or local network.

### Official description

comedi: vmk80xx: fix transfer-buffer overflows

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 v4.19.217 by commit 7a2021b896de1ad559d33b5c5cdd20b982242088, it was introduced in version v2.6.31 by commit 985cafccbf9b7f862aa1c5ee566801e18b5161fb. For more details please see the references link.

## Which versions are affected by GSD-2021-1001995?

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-2021-1001995?

No fix has been published for GSD-2021-1001995 yet. Limit exposure of the affected software until one is available.

## Is GSD-2021-1001995 being exploited?

There is no known exploitation of GSD-2021-1001995 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GSD-2021-1001995 and fix it if it is affected.

What it is: GSD-2021-1001995 is a memory corruption vulnerability in Kernel, published on 14 Nov 2021. It can only be exploited from the same machine or local network.
Exploitation: There is no known exploitation of GSD-2021-1001995 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-2021-1001995/ (Markdown: https://insights.sbomify.com/GSD-2021-1001995/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GSD-2021-1001995

---
From sbomify Insights: https://insights.sbomify.com/GSD-2021-1001995/
Summaries are generated and may contain mistakes; the official description above is the record.