What’s Vulnerable › Vulnerabilities

CVE-2020-13904

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-06-07 · updated 2026-06-17
• Weakness: CWE-416

Description

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: 16.04, 18.04, 20.04
• Debian Linux: 9.0, 10.0
• FFmpeg: 2.8, 4.2.3

References

• https://github.com/FFmpeg/FFmpeg/commit/6959358683c7533f586c07a766acc5fe9544d8b2
• https://lists.debian.org/debian-lts-announce/2020/07/msg00022.html
• https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200529033905.41926-1-lq%40chinaffmpeg.org/
• https://security.gentoo.org/glsa/202007-58
• https://trac.ffmpeg.org/ticket/8673
• https://usn.ubuntu.com/4431-1/
• https://www.debian.org/security/2020/dsa-4722
• https://github.com/FFmpeg/FFmpeg/commit/6959358683c7533f586c07a766acc5fe9544d8b2
• https://lists.debian.org/debian-lts-announce/2020/07/msg00022.html
• https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200529033905.41926-1-lq%40chinaffmpeg.org/
• https://security.gentoo.org/glsa/202007-58
• https://trac.ffmpeg.org/ticket/8673

Get alerted when CVE-2020-13904 or the next vulnerability affects your stack