# CVE-2022-47949: Memory corruption in n/a

> Remote attackers can execute arbitrary code via a buffer overflow in the NetworkBuffer class when victims join a game session.

- **Severity:** Critical 9.8 (`CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Dec 2022
- **Updated:** 14 Apr 2025
- **Also known as:** GHSA-85gv-67qj-g3gx

## What is CVE-2022-47949?

CVE-2022-47949 is a critical memory corruption vulnerability in n/a, published on 24 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Nintendo NetworkBuffer class, as used in Animal Crossing: New Horizons before 2.0.6 and other products, allows remote attackers to execute arbitrary code via a large UDP packet that causes a buffer overflow, aka ENLBufferPwn. The victim must join a game session with the attacker. Other affected products include Mario Kart 7 before 1.2, Mario Kart 8, Mario Kart 8 Deluxe before 2.1.0, ARMS before 5.4.1, Splatoon, Splatoon 2 before 5.5.1, Splatoon 3 before late 2022, Super Mario Maker 2 before 3.0.2, and Nintendo Switch Sports before late 2022.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2022-47949?

It affects 9 products.


Products: Nintendo Animal Crossing\, Nintendo Arms, Nintendo Mario Kart 7, Nintendo Mario Kart 8, Nintendo Splatoon, Nintendo Splatoon 2, Nintendo Splatoon 3, Nintendo Super Mario Maker 2, Nintendo Switch Sports.

## How do I fix CVE-2022-47949?

No fix has been published for CVE-2022-47949 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-47949 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-47949 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-47949 and fix it if it is affected.

What it is: CVE-2022-47949 is a critical memory corruption vulnerability in n/a, published on 24 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-47949 exists.

Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.

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/CVE-2022-47949/ (Markdown: https://insights.sbomify.com/CVE-2022-47949/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-47949
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-47949
- OSV: https://osv.dev/vulnerability/CVE-2022-47949

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-47949/
Summaries are generated and may contain mistakes; the official description above is the record.