CVE-2021-45257
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
- Record
CVE-2021-45257- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-835
- Updated
- 2026-11-02
CVE List No score
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
- Record
CVE-2021-45257- Updated
- 2026-11-02
EUVDEUVD-2021-32037 No score
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
- Record
EUVD-2021-32037- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-wjg5-gfx4-4qv2 No score
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
- Record
GHSA-wjg5-gfx4-4qv2- Weakness
- CWE-835
- Updated
- 2026-11-02
OSV
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
- Record
CVE-2021-45257- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-45257
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
- Record
DEBIAN-CVE-2021-45257- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-45257
An infinite loop vulnerability exists in nasm 2.16rc0 via the gpaste_tokens function.
- Record
UBUNTU-CVE-2021-45257- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
nasmDebian:12 |
All versions, plus listed versions 2.16.01-12.16.03-13.01-1 |
None known |
nasmDebian:13 |
All versions, plus listed versions 2.16.03-13.01-1 |
None known |
nasmDebian:14 |
All versions, plus listed versions 2.16.03-13.01-1 |
None known |
nasmUbuntu:16.04:LTS |
All versions, plus listed versions 2.11.06-1really2.11.05-12.11.08-12.11.08-1ubuntu0.1 |
None known |
nasmUbuntu:18.04:LTS |
All versions, plus listed versions 2.13.01-22.13.02-0.1 |
None known |
nasmUbuntu:20.04:LTS |
All versions, plus listed versions 2.14.02-1 |
None known |
nasmUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 2.15.05-12.15.05-1ubuntu0.1~esm12.15.05-1ubuntu0.1~esm2 |
None known |
nasmUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 2.16.01-12.16.01-1build12.16.01-1ubuntu0.1~esm12.16.01-1ubuntu0.1~esm2 |
None known |
nasmUbuntu:25.10 |
All versions, plus listed versions 2.16.03-1 |
None known |
nasmUbuntu:26.10 |
All versions, plus listed versions 3.01-1 |
None known |
nasmUbuntu:26.04:LTS |
All versions, plus listed versions 2.16.03-13.01-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45257 is a medium vulnerability (CVSS 5.5) in Nasm Netwide Assembler, published December 22, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.69%, the 53rd percentile. No source names a fixed version.
References
bugzilla.nasm.us/show_bug.cgi?id=3392790
nvd.nist.gov/vuln/detail/CVE-2021-45257
github.com/advisories/GHSA-wjg5-gfx4-4qv2
security-tracker.debian.org/tracker/CVE-2021-45257
ubuntu.com/security/CVE-2021-45257
web.archive.org/web/20250622101721/https://bugzilla.nasm.us/show_bug.cgi?id=3392790
cve.org/CVERecord?id=CVE-2021-45257