CVE-2019-9721

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

A denial of service in the subtitle decoder in FFmpeg 3.2 and 4.1 allows attackers to hog the CPU via a crafted video file in Matroska format, because handle_open_brace in libavcodec/htmlsubtitles.c has a complex format argument to sscanf.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-125

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://www.securityfocus.com/bid/107384Broken Link
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/894995c41e0795c7a44f81adc4838dedc3932e65Mailing List, Patch, Third Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/273f2755ce8635d42da3cde0eeba15b2e7842774Patch, Third Party Advisory
https://usn.ubuntu.com/3967-1/Third Party Advisory
http://www.securityfocus.com/bid/107384Broken Link
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/894995c41e0795c7a44f81adc4838dedc3932e65Mailing List, Patch, Third Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/273f2755ce8635d42da3cde0eeba15b2e7842774Patch, Third Party Advisory
https://usn.ubuntu.com/3967-1/Third Party Advisory

Timeline

Published: Mar 12, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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