CVE-2020-13904: Canonical Ubuntu Linux

Medium severity, CVSS 5.5. EPSS: 1.3% chance of exploitation in the next 30 days.

FFmpeg 2.8 and 4.2.3 has a use-after-free via a crafted EXTINF duration in an m3u8 file because parse_playlist in libavformat/hls.c frees a pointer, and later that pointer is accessed in av_probe_input_format3 in libavformat/format.c.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 20.04 only
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Ffmpeg Ffmpeg: version 2.8 only; version 4.2.3 only

Published 2020-06-07. Last modified 2026-06-17.