CVE-2026-64834
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductFfmpeg
PublishedJul 22, 2026
First seenJul 22, 2026
Weakness typeCWE-835CWE-835
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ffmpeg ffmpeg | 0.6.3 ≤ v ≤ 8.1.2 | — |
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