Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ffmpeg | Ffmpeg | >= 0.6.3, <= 8.1.2 |
Related Weaknesses (CWE)
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/11d5f475be95d22d5f0692220cc772b116aPatch
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23663Issue TrackingPatch
- https://www.vulncheck.com/advisories/ffmpeg-infinite-loop-dos-via-rtp-asf-demuxeThird Party Advisory
FAQ
What is CVE-2026-64834?
CVE-2026-64834 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 c...
How severe is CVE-2026-64834?
CVE-2026-64834 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64834?
Check the references section above for vendor advisories and patch information. Affected products include: Ffmpeg Ffmpeg.