How severe is CVE-2018-1000886?

CVE-2018-1000886 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-2018-1000886 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000886?

CVE-2018-1000886 primarily affects Nasm Netwide Assembler. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-1000886?

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

When was CVE-2018-1000886 published?

CVE-2018-1000886 was published on 2018-12-20 and last updated on 2026-06-17.

CVE-2018-1000886

CVE-2018-1000886 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Nasm Netwide Assembler
Published: 2018-12-20
Last modified: 2026-06-17

Description

nasm version 2.14.01rc5, 2.15 contains a Buffer Overflow vulnerability in asm/stdscan.c:130 that can result in Stack-overflow caused by triggering endless macro generation, crash the program. This attack appear to be exploitable via a crafted nasm input file.

Frequently asked questions

What is CVE-2018-1000886?: nasm version 2.14.01rc5, 2.15 contains a Buffer Overflow vulnerability in asm/stdscan.c:130 that can result in Stack-overflow caused by triggering endless macro generation, crash the program. This attack appear to be exploitable via a crafted nasm input file.
How severe is CVE-2018-1000886?: CVE-2018-1000886 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-2018-1000886 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000886?: CVE-2018-1000886 primarily affects Nasm Netwide Assembler. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-1000886?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-1000886 published?: CVE-2018-1000886 was published on 2018-12-20 and last updated on 2026-06-17.

References

https://bugzilla.nasm.us/show_bug.cgi?id=3392514

Affected products (2)

cpe:2.3:a:nasm:netwide_assembler:2.14.01rc5:*:*:*:*:*:*:*
cpe:2.3:a:nasm:netwide_assembler:2.15:*:*:*:*:*:*:*

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