What’s Vulnerable › Vulnerabilities

CVE-2022-47949

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 23.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-12-24 · updated 2026-06-17
• Weakness: CWE-120

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

• Nintendo Animal Crossing: New Horizons: before 2.0.6 — fixed in 2.0.6
• Nintendo Arms: before 5.4.1 — fixed in 5.4.1
• Nintendo Mario Kart 7: before 1.2 — fixed in 1.2
• Nintendo Mario Kart 8: before 2.1.0 — fixed in 2.1.0
• Nintendo Splatoon: all versions
• Nintendo Splatoon 2: before 5.5.1 — fixed in 5.5.1
• Nintendo Splatoon 3: all versions
• Nintendo Super Mario Maker 2: before 3.0.2 — fixed in 3.0.2
• Nintendo Switch Sports: all versions

How to fix

Upgrade to a fixed version: Nintendo Animal Crossing: New Horizons 2.0.6; Nintendo Arms 5.4.1; Nintendo Mario Kart 7 1.2; Nintendo Mario Kart 8 2.1.0; Nintendo Splatoon 2 5.5.1; Nintendo Super Mario Maker 2 3.0.2. Check the vendor advisory for mitigations.

References

• https://github.com/PabloMK7/ENLBufferPwn
• https://github.com/PabloMK7/ENLBufferPwn

Get alerted when CVE-2022-47949 or the next vulnerability affects your stack