CVE-2015-6821

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-09-06 · updated 2026-06-17
Weakness: CWE-20

Description

The ff_mpv_common_init function in libavcodec/mpegvideo.c in FFmpeg before 2.7.2 does not properly maintain the encoding context, which allows remote attackers to cause a denial of service (invalid pointer access) or possibly have unspecified other impact via crafted MPEG data.

Affected products

FFmpeg: through 2.7.1

References

http://ffmpeg.org/security.html
http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=b160fc290cf49b516c5b6ee0730fd9da7fc623b1
http://www.securitytracker.com/id/1033483
https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html
http://ffmpeg.org/security.html
http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=b160fc290cf49b516c5b6ee0730fd9da7fc623b1
http://www.securitytracker.com/id/1033483
https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html

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