CVE-2023-45675

Estado: ModificadaAlta (7.8)—

stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of bounds write in `f->vendor[len] = (char)'\0';`. The root cause is that if the len read in `start_decoder` is `-1` and `len + 1` becomes 0 when passed to `setup_malloc`. The `setup_malloc` behaves differently when `f->alloc.alloc_buffer` is pre-allocated. Instead of returning `NULL` as in `malloc` case it shifts the pre-allocated buffer by zero and returns the currently available memory block. This issue may lead to code execution.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.76%
Percentil entre todas las CVEs puntuadas: 54
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Nothings — STB Vorbis.c

CWE

CWE-787
CWE-787

Referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2023-45675",
  "cveTags": [],
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      "lang": "en",
      "value": "stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger out of bounds write in `f->vendor[len] = (char)'\\0';`. The root cause is that if the len read in `start_decoder` is `-1` and `len + 1` becomes 0 when passed to `setup_malloc`. The `setup_malloc` behaves differently when `f->alloc.alloc_buffer` is pre-allocated. Instead of returning `NULL` as in `malloc` case it shifts the pre-allocated buffer by zero and returns the currently available memory block. This issue may lead to code execution."
    },
    {
      "lang": "es",
      "value": "stb_vorbis es una librería de archivo único con licencia MIT para procesar archivos ogg vorbis. Un archivo manipulado puede provocar una escritura fuera de límites en `f-&gt;vendor[len] = (char)'\\0';`. La causa principal es que si el len leído en `start_decoder` es `-1` y `len + 1` se convierte en 0 cuando se pasa a `setup_malloc`. `setup_malloc` se comporta de manera diferente cuando `f-&gt;alloc.alloc_buffer` está preasignado. En lugar de devolver \"NULL\" como en el caso de \"malloc\", desplaza el búfer preasignado a cero y devuelve el bloque de memoria disponible actualmente. Este problema puede provocar la ejecución del código."
    }
  ],
  "lastModified": "2026-06-17T06:29:20.457",
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