What is CVE-2019-7147?

CVE-2019-7147 is a medium-severity vulnerability in Nasm Netwide Assembler, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2019-01-29.

How severe is CVE-2019-7147?

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

Is CVE-2019-7147 known to be exploited?

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

Out-of-bounds Read in Nasm Netwide Assembler

CVE-2019-7147

A buffer over-read exists in the function crc64ib in crc64.c in nasmlib in Netwide Assembler (NASM) 2.14rc16. A crafted asm input can cause segmentation faults, leading to denial-of-service.

Vulnerability class: Buffer Overflow

Published 2019-01-29 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.007 (53.4th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Nasm Netwide Assembler — versions 2.14

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

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

Frequently asked questions

What is CVE-2019-7147?: CVE-2019-7147 is a medium-severity vulnerability in Nasm Netwide Assembler, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2019-01-29.
How severe is CVE-2019-7147?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2019-7147 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.