What is CVE-2022-41420?

CVE-2022-41420 is a medium-severity vulnerability in Nasm Netwide Assembler, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-10-03.

How severe is CVE-2022-41420?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Nasm Netwide Assembler

CVE-2022-41420

nasm v2.16 was discovered to contain a stack overflow in the Ndisasm component

Vulnerability class: Buffer Overflow

Published 2022-10-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (21.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Nasm Netwide Assembler — versions 2.16

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

bugzilla.nasm.us/show_bug.cgi (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2022-41420?: CVE-2022-41420 is a medium-severity vulnerability in Nasm Netwide Assembler, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-10-03.
How severe is CVE-2022-41420?: Medium severity. CVSS v3 base score is 5.5 out of 10.