CVE-2026-64834

HIGH 7.5

FFmpeg 0.6.3 - 8.1.2 Infinite Loop DoS via RTP/ASF Demuxer

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-835
Vendor	ffmpeg
Product	ffmpeg
Published	Jul 22, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

FFmpeg / FFmpeg

0.6.3 ≤ 8.1.2 11d5f475be95d22d5f0692220cc772b116abc632

References

NVD ↗ CVE.org ↗ EPSS Data ↗

code.ffmpeg.org: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23663 code.ffmpeg.org: https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/11d5f475be95d22d5f0692220cc772b116abc632 vulncheck.com: https://www.vulncheck.com/advisories/ffmpeg-infinite-loop-dos-via-rtp-asf-demuxer

Credits

Pavel Kohout, Aisle Research