CVE-2020-21686

PoC —

CVSS 3.1

5.5 medium

EPSS

<1%p37

Published

Aug 22, 2023 (Aug 22, 2023)

Modified

Jun 17, 2026

Description

A stack-use-after-scope issue discovered in expand_mmac_params function in preproc.c in nasm before 2.15.04 allows remote attackers to cause a denial of service via crafted asm file.

Vendors: nasm
Products: netwide assembler
Weakness: CWE-562
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.4%)

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