CVE-2021-45257

Name: CVE-2021-45257
Creator: NVD / NIST
Published: 2021-12-22T17:15:09.217+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2021-45257 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

Description

An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.67%

47.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-835

Affected Software

Vendor	Product	Versions	Update
Nasm	Netwide Assembler	2.16	Rc0

References

https://bugzilla.nasm.us/show_bug.cgi?id=3392790Broken Link, Issue Tracking
https://bugzilla.nasm.us/show_bug.cgi?id=3392790Broken Link, Issue Tracking

Timeline

Published: Dec 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45257?

An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.

How severe is CVE-2021-45257?

CVE-2021-45257 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45257?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45257?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST