CVE-2018-18661: Canonical Ubuntu Linux

Medium severity, CVSS 6.5. EPSS: 2.9% chance of exploitation in the next 30 days.

An issue was discovered in LibTIFF 4.0.9. There is a NULL pointer dereference in the function LZWDecode in the file tif_lzw.c.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only; version 18.10 only
• Libtiff Libtiff: version 4.0.9 only

Published 2018-10-26. Last modified 2026-06-17.