CVE-2026-64834

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/11d5f475be95d22d5f0692220cc772b116abc632	Patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23663	Issue Tracking Patch
https://www.vulncheck.com/advisories/ffmpeg-infinite-loop-dos-via-rtp-asf-demuxer	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*

History

28 Jul 2026, 17:01

Type	Values Removed	Values Added
First Time		Ffmpeg Ffmpeg ffmpeg
CPE		cpe:2.3:a:ffmpeg:ffmpeg::::::::
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/11d5f475be95d22d5f0692220cc772b116abc632 -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/11d5f475be95d22d5f0692220cc772b116abc632 - Patch
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23663 -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23663 - Issue Tracking, Patch
References	~~() https://www.vulncheck.com/advisories/ffmpeg-infinite-loop-dos-via-rtp-asf-demuxer -~~	() https://www.vulncheck.com/advisories/ffmpeg-infinite-loop-dos-via-rtp-asf-demuxer - Third Party Advisory

22 Jul 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-22 18:17

Updated : 2026-07-28 17:01

NVD link : CVE-2026-64834

Mitre link : CVE-2026-64834

CVE.ORG link : CVE-2026-64834

JSON object : View

Products Affected

ffmpeg

ffmpeg

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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