CVE-2026-64834 (GCVE-0-2026-64834)

Vulnerability from cvelistv5 – Published: 2026-07-22 17:06 – Updated: 2026-07-22 17:06 X_Open Source
VLAI
Title
FFmpeg 0.6.3 - 8.1.2 Infinite Loop DoS via RTP/ASF Demuxer
Summary
FFmpeg versions 0.6.3 through 8.1.2 contain an infinite loop vulnerability in the RTP/ASF demuxer within libavformat/rtpdec_asf.c that allows remote attackers to cause denial of service by sending a crafted RTP/ASF stream. The rtp_asf_fix_header function fails to validate a minimum chunksize when iterating over ASF objects, causing the loop pointer to never advance when a chunksize is smaller than the 24-byte minimum ASF object header size, resulting in CPU exhaustion that denies service to legitimate users.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
Impacted products
Vendor Product Version
FFmpeg FFmpeg Affected: 0.6.3 , ≤ 8.1.2 (semver)
Affected: 11d5f475be95d22d5f0692220cc772b116abc632 (git)
Create a notification for this product.
Date Public
2026-07-02 00:00
Credits
Pavel Kohout, Aisle Research
Show details on NVD website
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          "repo": "https://code.ffmpeg.org/FFmpeg/FFmpeg",
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            "Recovery": "NOT_DEFINED",
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        },
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        }
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      "source": {
        "discovery": "UNKNOWN"
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      "title": "FFmpeg 0.6.3 - 8.1.2 Infinite Loop DoS via RTP/ASF Demuxer",
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    "cveId": "CVE-2026-64834",
    "datePublished": "2026-07-22T17:06:07.659Z",
    "dateReserved": "2026-07-20T18:27:48.161Z",
    "dateUpdated": "2026-07-22T17:06:07.659Z",
    "state": "PUBLISHED"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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