CVE-2020-21697

MEDIUM

FFmpeg 4.2 - Use-After-Free in mpeg_mux_write_packet

Title source: llm

Description

A heap-use-after-free in the mpeg_mux_write_packet function in libavformat/mpegenc.c of FFmpeg 4.2 allows to cause a denial of service (DOS) via a crafted avi file.

References (2)

Core 2

Core References

Exploit, Issue Tracking, Patch, Vendor Advisory x_refsource_misc

https://trac.ffmpeg.org/ticket/8188

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2021/dsa-4998

Scores

CVSS v3 6.5

EPSS 0.0028

EPSS Percentile 51.5%

Attack Vector NETWORK

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

Details

CWE

CWE-416

Status published

Products (2)

debian/debian_linux 11.0

ffmpeg/ffmpeg 4.2

Published Aug 10, 2021

Tracked Since Feb 18, 2026