CVE-2021-40647: MAN2HTML Project MAN2HTML

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

In man2html 1.6g, a specific string being read in from a file will overwrite the size parameter in the top chunk of the heap. This at least causes the program to segmentation abort if the heap size parameter isn't aligned correctly. In version before GLIBC version 2.29 and aligned correctly, it allows arbitrary write anywhere in the programs memory.

Affected products

• MAN2HTML Project MAN2HTML: version 1.6g only

Published 2022-09-09. Last modified 2026-06-17.