CVE-2022-47949Arms Buffer Overflow
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.
Published Dec 24, 2022 · Updated Apr 14, 2025
Key Facts
Patch immediately- CVE-2022-47949 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Animal Crossing\ (Nintendo), Arms (Nintendo), Mario Kart 7 (Nintendo) and 6 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 23% probability of exploitation in the next 30 days.
- Fixed versions are available, including Animal Crossing\ 2.0.6, Arms 5.4.1, Mario Kart 7 1.2.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
23%
Higher than 97.7% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
35/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
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.
Affected Products
10 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Animal Crossing\Nintendo | _new_horizons | 2.0.6 |
| ArmsNintendo | See advisory | 5.4.1 |
| Mario Kart 7Nintendo | See advisory | 1.2 |
| Mario Kart 8Nintendo | See advisory | 2.1.0 |
| SplatoonNintendo | See advisory | n/a |
Patched Releases
Animal Crossing\
2.0.6
Arms
5.4.1
Mario Kart 7
1.2
Mario Kart 8
2.1.0
Splatoon 2
5.5.1
Super Mario Maker 2
3.0.2
Timeline
Publicly disclosed
Dec 24, 2022
Last updated
Apr 14, 2025
Weakness Type
- CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
References
- exploitgithub.com · ENLBufferPwn
FAQ
Common Questions.
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.
Affected: Animal Crossing\ (Nintendo) versions _new_horizons; Arms (Nintendo); Mario Kart 7 (Nintendo), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Animal Crossing\ 2.0.6, Arms 5.4.1, Mario Kart 7 1.2.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2022-47949 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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