Medium severity · published Nov 30, 2018
CVE-2018-19755
There is an illegal address access at asm/preproc.c (function: is_mmacro) in Netwide Assembler (NASM) 2.14rc16 that will cause a denial of service (out-of-bounds array access)…
5.5
CVSS
1%
EPSS
No
On KEV
Description
There is an illegal address access at asm/preproc.c (function: is_mmacro) in Netwide Assembler (NASM) 2.14rc16 that will cause a denial of service (out-of-bounds array access) because a certain conversion can result in a negative integer.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NA
Netwide Assembler · Nasm
12.14 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-19755
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-19755
Exploit
https://bugzilla.nasm.us/show_bug.cgi?id=3392528
Exploit
https://repo.or.cz/nasm.git/commit/3079f7966dbed4497e36d5067cbfd896a90358cb
More from Netwide Assembler
9.8
CVE-2020-24978
In NASM 2.15.04rc3, there is a double-free vulnerability in pp_tokline asm/preproc.c
9.6
CVE-2026-6068
No description published yet
7.8
CVE-2025-8846
NASM Netwide Assember parser.c parse_line stack-based overflow
7.8
CVE-2025-8845
NASM Netwide Assember nasm.c assemble_file stack-based overflow
7.8
CVE-2025-8843
NASM Netwide Assember outmacho.c macho_no_dead_strip heap-based overflow
