CVE-2025-8844: A vulnerability was determined in NASM Netwide Assember 2.17rc0

Routine

LOW 3.3DOWNGRADE

CVE-2025-8844 is a low-severity flaw (CVSS 3.3) affecting netwide assembler. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was determined in NASM Netwide Assember 2.17rc0. This vulnerability affects the function parse_smacro_template of the file preproc.c. The manipulation leads to null pointer dereference. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-404, CWE-476
Published	2025-08-11
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: nasm

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-11 12:15 UTCPublished CVE record published
2026-06-17 10:07 UTCUpdated Record last modified

nasm netwide assembler DOWNGRADE

Affected: 2.17 rc0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.17

1. Check installed version

apt-cache policy netwide-assembler || rpm -q netwide-assembler || netwide-assembler --version

2. No fixed release: DOWNGRADE to a release before 2.17 (Debian / Ubuntu)

apt-cache madison netwide-assembler sudo apt install netwide-assembler=<VERSION_BEFORE_2.17> sudo apt-mark hold netwide-assembler

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list netwide-assembler sudo dnf downgrade netwide-assembler-<VERSION_BEFORE_2.17> sudo dnf versionlock add netwide-assembler

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-8844?

netwide assembler: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-8844 being exploited?

CVE-2025-8844 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-8844 affect?

CVE-2025-8844 affects netwide assembler. Severity is low (CVSS 3.3). A vulnerability was determined in NASM Netwide Assember 2.17rc0. This vulnerability affects the function parse_smacro_template of the file preproc.c. The manipulation leads to null pointer dereference. Attacking locally is a requirement. Th

How urgent is CVE-2025-8844?

Priority 21/100. Public exploit reference

Related CVEs

CVE-2025-8846 MEDIUM 5.3 DOWNGRADE A vulnerability has been found in NASM Netwide Assember 2.17rc0
CVE-2025-8845 MEDIUM 5.3 DOWNGRADE A vulnerability was identified in NASM Netwide Assember 2.17rc0
CVE-2025-8843 MEDIUM 5.3 DOWNGRADE A vulnerability was found in NASM Netwide Assember 2.17rc0
CVE-2025-8842 MEDIUM 5.3 DOWNGRADE A vulnerability has been found in NASM Netwide Assember 2.17rc0

References

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