CVE-2026-47749

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The issue was caused by sign confusion on the opcode length field. A crafted .ckpt file could trigger memcpy with a very large length derived from a negative signed value, causing immediate heap corruption. Any application using affected stable-diffusion.cpp releases to load untrusted .ckpt model files could be vulnerable. A malicious checkpoint file could cause heap corruption through memcpy with an attacker-controlled length. This may lead to process crash and could potentially be leveraged for code execution depending on heap layout. The attack requires the victim or application to load a .ckpt file from an untrusted source, such as a downloaded model from a model sharing site. The issue has been resolved in version master-584-0a7ae07. If developers are unable to immediately update their applications they can work around this issue by not loading .ckpt checkpoint files from untrusted sources, and referring to trusted model sources and safer formats such as .safetensors where possible."}, {"lang": "es", "value": "stable-diffusion.cpp es una biblioteca pura de C/C++ para ejecutar inferencia de modelos de difusi\u00f3n (Stable Diffusion, Flux, Wan, Qwen Image, Z-Image y m\u00e1s). Las versiones anteriores a master-584-0a7ae07 son vulnerables a un desbordamiento de b\u00fafer de mont\u00f3n en el an\u00e1lisis de SHORT_BINUNICODE para archivos de punto de control de PyTorch. El analizador pickle .ckpt en src/model.cpp conten\u00eda una vulnerabilidad de desbordamiento de b\u00fafer de mont\u00f3n en el gestor del c\u00f3digo de operaci\u00f3n SHORT_BINUNICODE. El problema fue causado por una confusi\u00f3n de signo en el campo de longitud del c\u00f3digo de operaci\u00f3n. Un archivo .ckpt manipulado podr\u00eda activar memcpy con una longitud muy grande derivada de un valor con signo negativo, causando una corrupci\u00f3n inmediata del mont\u00f3n. Cualquier aplicaci\u00f3n que utilice versiones afectadas de stable-diffusion.cpp para cargar archivos de modelo .ckpt no confiables podr\u00eda ser vulnerable. Un archivo de punto de control malicioso podr\u00eda causar corrupci\u00f3n del mont\u00f3n a trav\u00e9s de memcpy con una longitud controlada por el atacante. Esto podr\u00eda llevar a la ca\u00edda del proceso y potencialmente ser aprovechado para la ejecuci\u00f3n de c\u00f3digo dependiendo del dise\u00f1o del mont\u00f3n. El ataque requiere que la v\u00edctima o la aplicaci\u00f3n cargue un archivo .ckpt de una fuente no confiable, como un modelo descargado de un sitio de intercambio de modelos. El problema ha sido resuelto en la versi\u00f3n master-584-0a7ae07. Si los desarrolladores no pueden actualizar sus aplicaciones de inmediato, pueden solucionar este problema al no cargar archivos de punto de control .ckpt de fuentes no confiables, y refiri\u00e9ndose a fuentes de modelos confiables y formatos m\u00e1s seguros como .safetensors cuando sea posible."}], "id": "CVE-2026-47749", "lastModified": "2026-10-25T23:10:00.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47749", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-16T19:31:17.346999Z", "version": "2.0.3"}}]}, "published": "2026-06-16T19:16:55.867", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/leejet/stable-diffusion.cpp/commit/0a7ae07f948eff4611968a65a22bd7c7031ad74f"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/leejet/stable-diffusion.cpp/pull/1443"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-2c29-5hxg-fv9g"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-2c29-5hxg-fv9g"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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