CVE-2018-19214: Nasm Netwide Assembler

High severity, CVSS 7.8. EPSS: 1.3% chance of exploitation in the next 30 days.

Netwide Assembler (NASM) 2.14rc15 has a heap-based buffer over-read in expand_mmac_params in asm/preproc.c for insufficient input.

Affected products

• Nasm Netwide Assembler: version 12.14 only
• Red Hat Enterprise Linux: version 5.0 only; version 6.0 only; version 7.0 only

Published 2018-11-12. Last modified 2026-06-17.