Medium severity · published Jul 26, 2022
CVE-2021-33452
An issue was discovered in NASM version 2.16rc0
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
An issue was discovered in NASM version 2.16rc0. There are memory leaks in nasm_malloc() in nasmlib/alloc.c.
CVSS vector
CVSS:3.1/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)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NA
Netwide Assembler · Nasm
2.16 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-33452
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-33452
Exploit
https://bugzilla.nasm.us/show_bug.cgi?id=3392757
Third Party Advisory
https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d
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
A vulnerability has been found in NASM Netwide Assember 2.17rc0
7.8
CVE-2025-8845
A vulnerability was identified in NASM Netwide Assember 2.17rc0
7.8
CVE-2025-8843
A vulnerability was found in NASM Netwide Assember 2.17rc0