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CVE-2018-19755

19
FAUCET Score

CVE-2018-19755 describes an out-of-bounds array access vulnerability in Netwide Assembler (NASM) version 2.14rc16, specifically within the is_mmacro function in asm/preproc.c, caused by a negative integer conversion. This vulnerability has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity, requiring user interaction, and leading to a high impact denial of service. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.14CPE matchmatch criteria
cpe:2.3:a:nasm:netwide_assembler:12.14:rc16:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.00%
Probability of exploitation in next 30 days
EPSS Percentile
59.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0100 is in the 70th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (4)

redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: nasm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: nasm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: nasm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nasm

Vendor Advisories (1)

redhatCVE-2018-19755Low

nasm: out-of-bounds array access in is_mmacro in asm/preproc.c

Nov 12, 2018

References

bugzilla.nasm.us / show_bug.cgi
ExploitIssue TrackingThird Party Advisory
repo.or.cz / nasm.git/commit/3079f7966dbed4497e36d5067cbfd896a90358cb
ExploitThird Party Advisory