CVE-2021-38171: Debian Linux

Critical severity, CVSS 9.8. EPSS: 2.4% chance of exploitation in the next 30 days.

adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the init_get_bits return value, which is a necessary step because the second argument to init_get_bits can be crafted.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only; version 11.0 only
• Ffmpeg Ffmpeg: version 4.4 only

Published 2021-08-21. Last modified 2026-06-17.