CVE-2020-21686

Published: Aug 22, 2023Modified: Jun 17, 2026

5.5

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploitability: 1.8 / Impact: 3.6

Source: NVD

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.

Affected (1)

Products: Nasm: Netwide Assembler

Nasm

1 product

Netwide Assembler

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Nasm Netwide Assembler	Before 2.15.04

Related CWEs

CWE-562

Return of Stack Variable Address

A function returns the address of a stack variable, which will cause unintended program behavior, typically in the form of a crash.

References (2)

https://bugzilla.nasm.us/show_bug.cgi?id=3392643

Source: cve@mitre.org

ExploitIssue TrackingVendor Advisory

https://bugzilla.nasm.us/show_bug.cgi?id=3392643

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitIssue TrackingVendor Advisory

Timeline

No history available yet.