CVE-2023-42799
Status: ModifiedHigh (8.8)—
Moonlight-common-c contains the core GameStream client code shared between Moonlight clients. Moonlight-common-c is vulnerable to buffer overflow starting in commit 50c0a51b10ecc5b3415ea78c21d96d679e2288f9 due to unmitigated usage of unsafe C functions and improper bounds checking. A malicious game streaming server could exploit a buffer overflow vulnerability to crash a moonlight client, or achieve remote code execution (RCE) on the client (with insufficient exploit mitigations or if mitigations can be bypassed). The bug was addressed in commit 02b7742f4d19631024bd766bd2bb76715780004e.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Base score: 8.8
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 1.66%
- Percentile among all scored CVEs: 76
- Score date: 10/6/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (7)
CWEs
- CWE-120
References
- https://github.com/moonlight-stream/moonlight-common-c/commit/02b7742f4d19631024bd766bd2bb76715780004e
- https://github.com/moonlight-stream/moonlight-common-c/commit/50c0a51b10ecc5b3415ea78c21d96d679e2288f9
- https://github.com/moonlight-stream/moonlight-common-c/security/advisories/GHSA-r8cf-45f4-vf8m
- https://github.com/moonlight-stream/moonlight-common-c/commit/02b7742f4d19631024bd766bd2bb76715780004e
- https://github.com/moonlight-stream/moonlight-common-c/commit/50c0a51b10ecc5b3415ea78c21d96d679e2288f9
- https://github.com/moonlight-stream/moonlight-common-c/security/advisories/GHSA-r8cf-45f4-vf8m
Raw JSON (NVD)
Show
{
"id": "CVE-2023-42799",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2023-42799",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2024-02-07T16:57:28.464944Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "security-advisories@github.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.8
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.8,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "security-advisories@github.com",
"affectedData": [
{
"vendor": "moonlight-stream",
"product": "moonlight-common-c",
"versions": [
{
"status": "affected",
"version": ">= 50c0a51b10ecc5b3415ea78c21d96d679e2288f9, < 02b7742f4d19631024bd766bd2bb76715780004e"
}
]
}
]
}
],
"published": "2023-12-14T17:15:07.257",
"references": [
{
"url": "https://github.com/moonlight-stream/moonlight-common-c/commit/02b7742f4d19631024bd766bd2bb76715780004e",
"tags": [
"Patch"
],
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/moonlight-stream/moonlight-common-c/commit/50c0a51b10ecc5b3415ea78c21d96d679e2288f9",
"tags": [
"Patch"
],
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/moonlight-stream/moonlight-common-c/security/advisories/GHSA-r8cf-45f4-vf8m",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/moonlight-stream/moonlight-common-c/commit/02b7742f4d19631024bd766bd2bb76715780004e",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://github.com/moonlight-stream/moonlight-common-c/commit/50c0a51b10ecc5b3415ea78c21d96d679e2288f9",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://github.com/moonlight-stream/moonlight-common-c/security/advisories/GHSA-r8cf-45f4-vf8m",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "security-advisories@github.com",
"description": [
{
"lang": "en",
"value": "CWE-120"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Moonlight-common-c contains the core GameStream client code shared between Moonlight clients. Moonlight-common-c is vulnerable to buffer overflow starting in commit 50c0a51b10ecc5b3415ea78c21d96d679e2288f9 due to unmitigated usage of unsafe C functions and improper bounds checking. A malicious game streaming server could exploit a buffer overflow vulnerability to crash a moonlight client, or achieve remote code execution (RCE) on the client (with insufficient exploit mitigations or if mitigations can be bypassed). The bug was addressed in commit 02b7742f4d19631024bd766bd2bb76715780004e."
},
{
"lang": "es",
"value": "Moonlight-common-c contiene el código principal del cliente GameStream compartido entre los clientes Moonlight. Moonlight-common-c es vulnerable al desbordamiento del búfer a partir de el commit 50c0a51b10ecc5b3415ea78c21d96d679e2288f9 debido al uso absoluto de funciones C inseguras y a una verificación de los límites inadecuada. Un servidor de transmisión de juegos malicioso podría aprovechar una vulnerabilidad de desbordamiento del búfer para bloquear un cliente de luz nocturna o lograr la ejecución remota de código (RCE) en el cliente (con mitigaciones de explotación insuficientes o si se pueden evitar las mitigaciones). El error se solucionó en el commit 02b7742f4d19631024bd766bd2bb76715780004e."
}
],
"lastModified": "2026-06-17T06:24:32.183",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight-common-c:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EE5D99F2-FFB5-4239-855B-2CDAE0210FE3",
"versionEndExcluding": "2023-10-06",
"versionStartIncluding": "2022-11-04"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight:*:*:*:*:*:iphone_os:*:*",
"vulnerable": true,
"matchCriteriaId": "730ABEDB-A45B-487D-90E5-58188F33021E",
"versionEndIncluding": "8.5.0",
"versionStartIncluding": "8.4.0"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight:*:*:*:*:*:tvos:*:*",
"vulnerable": true,
"matchCriteriaId": "F8DC3BA3-941C-40D2-AD1B-AF7971D99672",
"versionEndIncluding": "8.5.0",
"versionStartIncluding": "8.4.0"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight:*:*:*:*:*:android:*:*",
"vulnerable": true,
"matchCriteriaId": "6D8BB0A6-B219-4AFF-BE01-BC0546DAAF91",
"versionEndIncluding": "11.0",
"versionStartIncluding": "10.10"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight:0.10.22:*:*:*:*:chrome:*:*",
"vulnerable": true,
"matchCriteriaId": "E50A8A78-8606-49DD-8D95-3AE7DFBA3E87"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight_embedded:2.6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9E1F448D-0CFE-4DAE-A119-8AF4F8FD48EF"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight_xbox:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BFE72448-E647-43F9-A72C-F86118596EE3",
"versionEndIncluding": "1.14.40",
"versionStartIncluding": "1.12.0"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight_tv:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "38BDA766-E56D-496D-BC16-AD2026E04A7F",
"versionEndIncluding": "1.5.27",
"versionStartIncluding": "1.5.4"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight_switch:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5FFADEE0-F587-4444-AE6F-323E20808042",
"versionEndIncluding": "0.13.3",
"versionStartIncluding": "0.13"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moonlight-stream:moonlight_vita:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EFAF4088-233D-46FA-A031-ACCF0D7FF78F",
"versionEndIncluding": "0.9.3",
"versionStartIncluding": "0.9.2"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "security-advisories@github.com"
}