CVE-2018-16517
asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.
Does this matter?
A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 4.5%. Treat it as high on anything reachable from the internet.
Description
asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 4.50% probability · 91th percentile
- Public exploits
- 1 in Exploit-DB · first 18 April 2019
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- nasm/netwide assembler
- Source
- cve@mitre.org
EPSS 4.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00015.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00017.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/152566/Netwide-Assembler-NASM-2.14rc15-Null-Pointer-Dereference.htmlExploit, Third Party Advisory, VDB Entry
- https://bugzilla.nasm.us/show_bug.cgi?id=3392513Exploit, Issue Tracking, Third Party Advisory
- https://fakhrizulkifli.github.io/CVE-2018-16517.htmlExploit, Third Party Advisory
- https://www.exploit-db.com/exploits/46726/Exploit, Third Party Advisory, VDB Entry
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00015.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00017.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/152566/Netwide-Assembler-NASM-2.14rc15-Null-Pointer-Dereference.htmlExploit, Third Party Advisory, VDB Entry
- https://bugzilla.nasm.us/show_bug.cgi?id=3392513Exploit, Issue Tracking, Third Party Advisory
- https://fakhrizulkifli.github.io/CVE-2018-16517.htmlExploit, Third Party Advisory
- https://www.exploit-db.com/exploits/46726/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.