What is CVE-2022-46456?

CVE-2022-46456 is a medium-severity vulnerability in Nasm Netwide Assembler, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.1/10. Published 2023-01-04.

How severe is CVE-2022-46456?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2022-46456 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Nasm Netwide Assembler

CVE-2022-46456

NASM v2.16 was discovered to contain a global buffer overflow in the component dbgdbg_typevalue at /output/outdbg.c.

Vulnerability class: Buffer Overflow

Published 2023-01-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (26.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Nasm Netwide Assembler — versions 2.16, 2.16.01

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

References

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

Frequently asked questions

What is CVE-2022-46456?: CVE-2022-46456 is a medium-severity vulnerability in Nasm Netwide Assembler, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.1/10. Published 2023-01-04.
How severe is CVE-2022-46456?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2022-46456 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.