What is CVE-2018-20535?

CVE-2018-20535 is a medium-severity vulnerability in Nasm Netwide Assembler, classified under Use After Free. CVSS score: 5.5/10. Published 2018-12-28.

How severe is CVE-2018-20535?

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

Is CVE-2018-20535 known to be exploited?

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

Use After Free in Nasm Netwide Assembler

CVE-2018-20535

There is a use-after-free at asm/preproc.c (function pp_getline) in Netwide Assembler (NASM) 2.14rc16 that will cause a denial of service during a line-number increment attempt.

Vulnerability class: Use-After-Free

EPSS: 0.008 (52.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Nasm Netwide_assembler — versions 2.14.0
N/a — versions n/a

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, x_refsource_MISC, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2018-20535?: CVE-2018-20535 is a medium-severity vulnerability in Nasm Netwide Assembler, classified under Use After Free. CVSS score: 5.5/10. Published 2018-12-28.
How severe is CVE-2018-20535?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2018-20535 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.