CVE-2011-3937: Ffmpeg

High severity, CVSS 10.0. EPSS: 2.3% chance of exploitation in the next 30 days.

The H.263 codec (libavcodec/h263dec.c) in FFmpeg 0.7.x before 0.7.12, 0.8.x before 0.8.11, and unspecified versions before 0.10, 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 has unspecified impact and attack vectors related to "width/height changing with frame threads."

Affected products

• Ffmpeg Ffmpeg: up to and including 0.9.1; version 0.3 only; version 0.3.1 only; version 0.3.2 only; version 0.3.3 only; version 0.3.4 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 2013-01-05. Last modified 2026-06-16.