CVE-2019-7663: Canonical Ubuntu Linux

Medium severity, CVSS 6.5. EPSS: 3.4% chance of exploitation in the next 30 days.

An Invalid Address dereference was discovered in TIFFWriteDirectoryTagTransferfunction in libtiff/tif_dirwrite.c in LibTIFF 4.0.10, affecting the cpSeparateBufToContigBuf function in tiffcp.c. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted tiff file. This is different from CVE-2018-12900.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 18.04 only; version 18.10 only
• Debian Debian Linux: version 8.0 only
• Libtiff Libtiff: version 4.0.10 only
• Opensuse Leap: version 15.0 only

Published 2019-02-09. Last modified 2026-06-17.