CVE-2011-3947: Ffmpeg

Medium severity, CVSS 6.8. EPSS: 3.9% chance of exploitation in the next 30 days.

Buffer overflow in mjpegbdec.c in libavcodec in FFmpeg 0.7.x before 0.7.12 and 0.8.x before 0.8.11, and in Libav 0.5.x before 0.5.9, 0.6.x before 0.6.6, 0.7.x before 0.7.5, and 0.8.x before 0.8.1, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted MJPEG-B file.

Affected products

• Ffmpeg Ffmpeg: version 0.7.1 only; version 0.7.2 only; version 0.7.6 only; version 0.7.7 only; version 0.7.8 only; version 0.7.9 only; …
• Libav Libav: version 0.5 only; version 0.5.1 only; version 0.5.2 only; version 0.5.3 only; version 0.5.4 only; version 0.5.5 only; …

Published 2012-08-20. Last modified 2026-06-16.