CVE-2018-7731: Canonical Ubuntu Linux

Medium severity, CVSS 5.5. EPSS: 1.2% chance of exploitation in the next 30 days.

An issue was discovered in Exempi through 2.4.4. XMPFiles/source/FormatSupport/WEBP_Support.cpp does not check whether a bitstream has a NULL value, leading to a NULL pointer dereference in the WEBP::VP8XChunk class.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 17.10 only
• Exempi Project Exempi: up to and including 2.4.4

Published 2018-03-06. Last modified 2026-06-17.