CVE-2021-45256: Nasm Netwide Assembler

Medium severity, CVSS 5.5. EPSS: 0.7% chance of exploitation in the next 30 days.

A Null Pointer Dereference vulnerability existfs in nasm 2.16rc0 via asm/preproc.c.

Affected products

• Nasm Netwide Assembler: version 2.16 only

Published 2021-12-22. Last modified 2026-06-17.