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CVE-2018-16517

32
FAUCET Score

CVE-2018-16517 is a NULL Pointer Dereference vulnerability affecting Netwide Assembler (NASM) versions, specifically within asm/labels.c. An attacker can exploit this by providing a crafted file, leading to a denial of service. Rated as Medium severity (CVSS 5.5), it requires local access and user interaction (e.g., opening a malicious file) for exploitation, with the primary impact being system unavailability. While not listed on the KEV catalog or showing active exploitation, a Proof-of-Concept exploit is publicly available on ExploitDB, though there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.13.03CPE matchmatch criteria
cpe:2.3:a:nasm:netwide_assembler:*:*:*:*:*:*:*:*
2.14CPE matchmatch criteria
cpe:2.3:a:nasm:netwide_assembler:2.14:rc15:*:*:*:*:*:*
2.14.0CPE matchmatch criteria
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc1:*:*:*:*:*:*
2.14.0CPE matchmatch criteria
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc10:*:*:*:*:*:*
2.14.0CPE matchmatch criteria
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc11:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
5.17%
Probability of exploitation in next 30 days
EPSS Percentile
91.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-46726 · Apr 18, 2019
This CVE's current EPSS score of 0.0517 is in the 97th percentile among its peer group of 5,758 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 (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: nasm

Vendor Advisories (1)

redhatCVE-2018-16517Low

nasm: NULL Pointer Dereference in asm/labels.c

Sep 5, 2018

References

lists.opensuse.org / opensuse-security-announce/2020-07/msg00015.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-07/msg00017.html
Mailing ListThird Party Advisory
packetstormsecurity.com / files/152566/Netwide-Assembler-NASM-2.14rc15-Null-Pointer-Dereference.html
ExploitThird Party AdvisoryVDB Entry
bugzilla.nasm.us / show_bug.cgi
ExploitIssue TrackingThird Party Advisory
fakhrizulkifli.github.io / CVE-2018-16517.html
ExploitThird Party Advisory
exploit-db.com / exploits/46726
ExploitThird Party AdvisoryVDB Entry