CVE-2020-13904

Name: CVE-2020-13904
Creator: NVD / NIST
Published: 2020-06-07T19:15:09.703+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.28%

Last modified Jun 17, 2026

CVE-2020-13904 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 1.28% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

1.28%

66.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Ffmpeg	Ffmpeg	2.8
Ffmpeg	Ffmpeg	4.2.3
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	20.04
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://github.com/FFmpeg/FFmpeg/commit/6959358683c7533f586c07a766acc5fe9544d8b2Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00022.htmlMailing List, Third Party Advisory
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200529033905.41926-1-lq%40chinaffmpeg.org/
https://security.gentoo.org/glsa/202007-58Third Party Advisory
https://trac.ffmpeg.org/ticket/8673Exploit, Issue Tracking, Vendor Advisory
https://usn.ubuntu.com/4431-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4722Third Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/6959358683c7533f586c07a766acc5fe9544d8b2Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00022.htmlMailing List, Third Party Advisory
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20200529033905.41926-1-lq%40chinaffmpeg.org/
https://security.gentoo.org/glsa/202007-58Third Party Advisory
https://trac.ffmpeg.org/ticket/8673Exploit, Issue Tracking, Vendor Advisory
https://usn.ubuntu.com/4431-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4722Third Party Advisory

Timeline

Published: Jun 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13904?

How severe is CVE-2020-13904?

CVE-2020-13904 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.28% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13904?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-13904?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST