What is CVE-2018-19215?

CVE-2018-19215 is a high-severity vulnerability in Nasm Netwide Assembler, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2018-11-12.

How severe is CVE-2018-19215?

High severity. CVSS v3 base score is 7.8 out of 10.

Out-of-bounds Read in Nasm Netwide Assembler

CVE-2018-19215

Netwide Assembler (NASM) 2.14rc16 has a heap-based buffer over-read in expand_mmac_params in asm/preproc.c for the special cases of the % and $ and ! characters.

Vulnerability class: Buffer Overflow

Published 2018-11-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (68.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Nasm Netwide Assembler — versions 12.14
Red Hat Enterprise Linux — versions 5.0, 6.0, 7.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

bugzilla.nasm.us/show_bug.cgi (Exploit, Issue Tracking)
repo.or.cz/nasm.git/commit/4b5b737d4991578b1918303dc0fd9c9ab5c7ce4f (Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2020-07/msg00017.html (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2020-07/msg00015.html (vendor-advisory)

Frequently asked questions

What is CVE-2018-19215?: CVE-2018-19215 is a high-severity vulnerability in Nasm Netwide Assembler, classified under Out-of-bounds Read. CVSS score: 7.8/10. Published 2018-11-12.
How severe is CVE-2018-19215?: High severity. CVSS v3 base score is 7.8 out of 10.