How severe is CVE-2022-47949?

CVE-2022-47949 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-47949 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-47949?

CVE-2022-47949 primarily affects Nintendo Animal Crossing. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-47949?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2022-47949 published?

CVE-2022-47949 was published on 2022-12-24 and last updated on 2026-06-17.

CVE-2022-47949

CVE-2022-47949 is a critical-severity vulnerability in Nintendo Animal Crossing with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Nintendo Animal Crossing
Published: 2022-12-24
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-47949?: 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.
How severe is CVE-2022-47949?: CVE-2022-47949 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-47949 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-47949?: CVE-2022-47949 primarily affects Nintendo Animal Crossing. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-47949?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-47949 published?: CVE-2022-47949 was published on 2022-12-24 and last updated on 2026-06-17.

References

https://github.com/PabloMK7/ENLBufferPwn

Affected products (10)

cpe:2.3:a:nintendo:animal_crossing\:_new_horizons:*:*:*:*:*:*:*:*
cpe:2.3:a:nintendo:arms:*:*:*:*:*:*:*:*
cpe:2.3:a:nintendo:mario_kart_7:*:*:*:*:*:*:*:*
cpe:2.3:a:nintendo:mario_kart_8:*:*:*:*:deluxe:*:*:*
cpe:2.3:a:nintendo:mario_kart_8:-:*:*:*:-:*:*:*
cpe:2.3:a:nintendo:splatoon:*:*:*:*:*:*:*:*
cpe:2.3:a:nintendo:splatoon_2:*:*:*:*:*:*:*:*
cpe:2.3:a:nintendo:splatoon_3:*:*:*:*:*:*:*:*
cpe:2.3:a:nintendo:super_mario_maker_2:*:*:*:*:*:*:*:*
cpe:2.3:a:nintendo:switch_sports:*:*:*:*:*:*:*:*

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