CVE-2018-12458: Debian Linux

Medium severity, CVSS 6.5. EPSS: 1.5% chance of exploitation in the next 30 days.

An improper integer type in the mpeg4_encode_gop_header function in libavcodec/mpeg4videoenc.c in FFmpeg 2.8 and 4.0 may trigger an assertion violation while converting a crafted AVI file to MPEG4, leading to a denial of service.

Affected products

• Debian Debian Linux: version 9.0 only
• Ffmpeg Ffmpeg: version 2.8 only; version 4.0 only

Published 2018-06-15. Last modified 2026-06-17.