How severe is CVE-2018-16517?

CVE-2018-16517 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-16517 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16517?

CVE-2018-16517 primarily affects Nasm Netwide Assembler. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-16517?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-16517 published?

CVE-2018-16517 was published on 2018-09-06 and last updated on 2026-06-17.

CVE-2018-16517

CVE-2018-16517 is a medium-severity vulnerability in Nasm Netwide Assembler with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Nasm Netwide Assembler
Published: 2018-09-06
Last modified: 2026-06-17

Description

asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.

Frequently asked questions

What is CVE-2018-16517?: asm/labels.c in Netwide Assembler (NASM) is prone to NULL Pointer Dereference, which allows the attacker to cause a denial of service via a crafted file.
How severe is CVE-2018-16517?: CVE-2018-16517 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-16517 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16517?: CVE-2018-16517 primarily affects Nasm Netwide Assembler. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-16517?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-16517 published?: CVE-2018-16517 was published on 2018-09-06 and last updated on 2026-06-17.

References

Affected products (16)

cpe:2.3:a:nasm:netwide_assembler:*:*:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14:rc15:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc1:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc10:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc11:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc12:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc13:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc14:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc2:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc3:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc4:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc5:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc6:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc7:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc8:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.14.0:rc9:*:*:*:*:*:*

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