How severe is CVE-2025-8843?

CVE-2025-8843 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-8843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8843?

CVE-2025-8843 affects Nasm Netwide Assembler. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8843?

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

Does CVE-2025-8843 have an EU (EUVD) identifier?

Yes. CVE-2025-8843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24139.

When was CVE-2025-8843 published?

CVE-2025-8843 was published on 2025-08-11 and last updated on 2026-06-17.

CVE-2025-8843

CVE-2025-8843 is a medium-severity vulnerability in Nasm Netwide Assembler with a CVSS 3.x base score of 5.3. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
CVSS v4: 1.9
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24139
Weakness: CWE-787
Affected product: Nasm Netwide Assembler
Published: 2025-08-11
Last modified: 2026-06-17

Description

A vulnerability was found in NASM Netwide Assember 2.17rc0. This affects the function macho_no_dead_strip of the file outmacho.c. The manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-8843?: A vulnerability was found in NASM Netwide Assember 2.17rc0. This affects the function macho_no_dead_strip of the file outmacho.c. The manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-8843?: CVE-2025-8843 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-8843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8843?: CVE-2025-8843 affects Nasm Netwide Assembler. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-8843 have an EU (EUVD) identifier?: Yes. CVE-2025-8843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24139.
When was CVE-2025-8843 published?: CVE-2025-8843 was published on 2025-08-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nasm:netwide_assembler:2.17:rc0:*:*:*:*:*:*

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