CVE-2016-4804: Canonical Ubuntu Linux

Medium severity, CVSS 6.2. EPSS: 0.4% chance of exploitation in the next 30 days.

The read_boot function in boot.c in dosfstools before 4.0 allows attackers to cause a denial of service (crash) via a crafted filesystem, which triggers a heap-based buffer overflow in the (1) read_fat function or an out-of-bounds heap read in (2) get_fat function.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.10 only; version 16.04 only
• Dosfstools Project Dosfstools: up to and including 3.0.28
• Opensuse Leap: version 42.1 only
• Opensuse Opensuse: version 13.2 only

Published 2016-06-03. Last modified 2026-06-17.