CVE-2021-40985: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.9% chance of exploitation in the next 30 days.

A stack-based buffer under-read in htmldoc before 1.9.12, allows attackers to cause a denial of service via a crafted BMP image to image_load_bmp.

Affected products

• Debian Debian Linux: version 9.0 only
• Htmldoc Project Htmldoc: before 1.9.12 (fixed in 1.9.12)

Published 2021-11-03. Last modified 2026-06-17.