CVE-2020-18974
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of...
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.
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
- Low
Exploit likelihood
What each source reports
NVD Score used
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.
- Record
CVE-2020-18974- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-120
- Updated
- 2026-11-02
CVE List No score
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.
- Record
CVE-2020-18974- Updated
- 2026-11-02
EUVDEUVD-2020-10885 No score
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.
- Record
EUVD-2020-10885- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4wgw-2p35-h26h No score
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of...
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.
- Record
GHSA-4wgw-2p35-h26h- Weakness
- CWE-120
- Updated
- 2026-11-02
OSV
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.
- Record
CVE-2020-18974- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
OSVDEBIAN-CVE-2020-18974
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.
- Record
DEBIAN-CVE-2020-18974- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
OSVJLSEC-2026-199
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.
- Record
JLSEC-2026-199- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-18974
Buffer Overflow in Netwide Assembler (NASM) v2.15.xx allows attackers to cause a denial of service via 'crc64i' in the component 'nasmlib/crc64'. This issue is different than CVE-2019-7147.
- Record
UBUNTU-CVE-2020-18974- CVSS 3.1
- 3.3 Low
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L - 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 |
NASM_jllJulia |
before 2.16.1+0 | 2.16.1+0 |
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-2020-18974 is a low vulnerability (CVSS 3.3) in Nasm Netwide Assembler, published August 25, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.83%, the 57th percentile. Fixed in NASM_jll 2.16.1+0.