CVE-2017-17942: Libtiff

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

In LibTIFF 4.0.9, there is a heap-based buffer over-read in the function PackBitsEncode in tif_packbits.c.

Affected products

• Libtiff Libtiff: version 4.0.9 only

Published 2017-12-28. Last modified 2026-06-17.