CVE-2019-11338: Canonical Ubuntu Linux

High severity, CVSS 8.8. EPSS: 2.4% chance of exploitation in the next 30 days.

libavcodec/hevcdec.c in FFmpeg 3.4 and 4.1.2 mishandles detection of duplicate first slices, which allows remote attackers to cause a denial of service (NULL pointer dereference and out-of-array access) or possibly have unspecified other impact via crafted HEVC data.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 18.10 only; version 19.04 only; version 20.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Ffmpeg Ffmpeg: version 3.4 only; version 4.1.2 only
• Novell Suse Package Hub For Suse Linux Enterprise: version 12 only

Published 2019-04-19. Last modified 2026-06-17.