CVE catalog
CVE-2021-33450
NASM regression
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.33% · Oct 25, 2026
An issue was discovered in NASM version 2.16rc0. There are memory leaks in nasm_calloc() in nasmlib/alloc.c.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nasm | sid | 3.01-1 | vulnerable |
| Debian | nasm | forky | 3.01-1 | vulnerable |
| Debian | nasm | trixie | 2.16.03-1 | vulnerable |
| Debian | nasm | bookworm | 2.16.01-1 | vulnerable |
| Ubuntu | nasm | noble | Not reported | vulnerable |
| Ubuntu | nasm | noble | 2.16.01-1ubuntu0.1~esm2 | fixed |
| Ubuntu | nasm | noble | 2.16.01-1ubuntu0.1~esm1 | fixed |
| Ubuntu | nasm | pro | 2.16.01-1 | vulnerable |
| Ubuntu | nasm | pro | 2.16.01-1build1 | vulnerable |
| Ubuntu | nasm | pro | 2.16.01-1ubuntu0.1~esm1 | vulnerable |
| Ubuntu | nasm | pro | 2.16.01-1ubuntu0.1~esm2 | fixed |
| Ubuntu | nasm | pro | 2.16.01-1 | vulnerable |
| Ubuntu | nasm | pro | 2.16.01-1build1 | vulnerable |
| Ubuntu | nasm | pro | 2.16.01-1ubuntu0.1~esm1 | fixed |
| Ubuntu | nasm | pro | 2.16.01-1 | vulnerable |
| Ubuntu | nasm | pro | 2.16.01-1build1 | vulnerable |
| Ubuntu | nasm | pro | 2.16.01-1ubuntu0.1~esm1 | vulnerable |
| Ubuntu | nasm | pro | 2.16.01-1ubuntu0.1~esm2 | vulnerable |
| Ubuntu | nasm | 25.10 | 2.16.03-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nasm | source | sid | (unfixed) | unimportant | Not reported | Not reported |
| Debian | nasm | source | forky | (unfixed) | unimportant | Not reported | Not reported |
| Debian | nasm | source | trixie | (unfixed) | unimportant | Not reported | Not reported |
| Debian | nasm | source | bookworm | (unfixed) | unimportant | Not reported | Not reported |
| Ubuntu | nasm | deb | noble | 2.16.01-1ubuntu0.1~esm2 | Not reported | Not reported | Not reported |
| Ubuntu | nasm | deb | noble | 2.16.01-1ubuntu0.1~esm1 | Not reported | Not reported | Not reported |
| Ubuntu | nasm | deb | pro | 2.16.01-1ubuntu0.1~esm2 | Not reported | USN-8248-2 | Not reported |
| Ubuntu | nasm | deb | pro | 2.16.01-1ubuntu0.1~esm1 | Not reported | USN-8248-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [nasm]Affected
Details (2)
2.16.01-1· amd64 · bookwormAffected
usn · nasm · debian · bookworm; usn · nasm · debian · 12
2.16.01-1· arm64 · bookwormAffected
usn · nasm · debian · bookworm; usn · nasm · debian · 12
[Debian 13 (Trixie)]
- [nasm]Affected
Details (2)
2.16.03-1· amd64 · trixieAffected
usn · nasm · debian · 13
2.16.03-1· arm64 · trixieAffected
usn · nasm · debian · 13
Observed:
References
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-33450]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-33450]
- [https://osv.dev/vulnerability/USN-8248-1]
- [https://osv.dev/vulnerability/USN-8248-2]
- [https://security-tracker.debian.org/tracker/CVE-2021-33450]
- [https://ubuntu.com/security/notices/USN-8248-1]
- [https://ubuntu.com/security/notices/USN-8248-2]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Ubuntu Security Notices (USN)]