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CVE-2019-9718

Status: ModifiedMedium (6.5)—

In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because ff_htmlmarkup_to_ass in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.

CVSS

Exploitation probability (EPSS)

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 (3)

CWEs

References

Raw JSON (NVD)

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  "id": "CVE-2019-9718",
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          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
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  "published": "2019-03-12T09:29:00.530",
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      "value": "In FFmpeg 3.2 and 4.1, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because ff_htmlmarkup_to_ass in libavcodec/htmlsubtitles.c has a complex format argument to sscanf."
    },
    {
      "lang": "es",
      "value": "En FFmpeg, versión 3.2 y 4.1, una denegación de servicio en el decodificador de subtítulos permite a los atacantes acaparar la CPU mediante un archivo de vídeo manipulado en formato Matroska, debido a que ff_htmlmarkup_to_ass en libavcodec/htmlsubtitles.c tiene un argumento de formato complejo en sscanf"
    }
  ],
  "lastModified": "2026-06-17T02:44:13.640",
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