# GSD-2021-1001222: seq_buf: Fix overflow in seq_buf_putmem_hex()

> An integer overflow in the Linux kernel's seq_buf_putmem_hex function can lead to memory corruption or denial of service.

- **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:** 3 Aug 2021

## What is GSD-2021-1001222?

GSD-2021-1001222 is a vulnerability in Kernel, published on 3 Aug 2021. 

### Official description

seq_buf: Fix overflow in seq_buf_putmem_hex()

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 v5.13.3 by commit d57fcab190b60f43046d5836c3c56114b4f50080, it was introduced in version v2.6.27 by commit 5e3ca0ec76fce92daa4eed0d02de9c79b1fe3920. For more details please see the references link.

## Which versions are affected by GSD-2021-1001222?

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-2021-1001222?

No fix has been published for GSD-2021-1001222 yet. Limit exposure of the affected software until one is available.

## Is GSD-2021-1001222 being exploited?

There is no known exploitation of GSD-2021-1001222 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GSD-2021-1001222 and fix it if it is affected.

What it is: GSD-2021-1001222 is a vulnerability in Kernel, published on 3 Aug 2021. 
Exploitation: There is no known exploitation of GSD-2021-1001222 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-2021-1001222/ (Markdown: https://insights.sbomify.com/GSD-2021-1001222/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GSD-2021-1001222

---
From sbomify Insights: https://insights.sbomify.com/GSD-2021-1001222/
Summaries are generated and may contain mistakes; the official description above is the record.