CVE-2018-20029: The nxfs.sys driver in the DokanFS library 0.6.0 in NoMachine before 6.4.6 on Windows 10 allows local users to

Q: How do I fix CVE-2018-20029?

dokany: downgrade or apply the listed mitigation; nomachine: upgrade to 6.4.6. Exact commands for each OS are on this page.

Q: Is CVE-2018-20029 being exploited?

CVE-2018-20029 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-20029 affect?

CVE-2018-20029 affects dokany, nomachine. Severity is medium (CVSS 5.5). The nxfs.sys driver in the DokanFS library 0.6.0 in NoMachine before 6.4.6 on Windows 10 allows local users to cause a denial of service (BSOD) because uninitialized memory can be read.

Q: How urgent is CVE-2018-20029?

Priority 26/100. No elevated risk signals yet.

Routine

MEDIUM 5.5DOWNGRADEUPGRADE

CVE-2018-20029 is a medium-severity flaw (CVSS 5.5) affecting dokany, nomachine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The nxfs.sys driver in the DokanFS library 0.6.0 in NoMachine before 6.4.6 on Windows 10 allows local users to cause a denial of service (BSOD) because uninitialized memory can be read.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-908
Published	2018-12-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dokan-dev · nomachine

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

Am I affected?

Timeline

2018-12-10 20:29 UTCPublished CVE record published
2026-06-17 01:52 UTCUpdated Record last modified

dokan-dev dokany DOWNGRADE

Affected: 0.6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.6.0

1. Check installed version

apt-cache policy dokany || rpm -q dokany || dokany --version

2. No fixed release: DOWNGRADE to a release before 0.6.0 (Debian / Ubuntu)

apt-cache madison dokany sudo apt install dokany=<VERSION_BEFORE_0.6.0> sudo apt-mark hold dokany

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

dnf --showduplicates list dokany sudo dnf downgrade dokany-<VERSION_BEFORE_0.6.0> sudo dnf versionlock add dokany

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.

nomachine nomachine UPGRADE

Affected: < 6.4.6

Fixed in: 6.4.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nomachine || rpm -q nomachine || nomachine --version

2. UPGRADE to 6.4.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nomachine

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nomachine

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2018-20029?

dokany: downgrade or apply the listed mitigation; nomachine: upgrade to 6.4.6. Exact commands for each OS are on this page.

Is CVE-2018-20029 being exploited?

CVE-2018-20029 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-2018-20029 affect?

CVE-2018-20029 affects dokany, nomachine. Severity is medium (CVSS 5.5). The nxfs.sys driver in the DokanFS library 0.6.0 in NoMachine before 6.4.6 on Windows 10 allows local users to cause a denial of service (BSOD) because uninitialized memory can be read.

How urgent is CVE-2018-20029?

Priority 26/100. No elevated risk signals yet.

Software pages

Windows vulnerabilities

Related CVEs

CVE-2018-5410 HIGH 7.8 UPGRADE Dokan, versions between 1.0.0.5000 and 1.2.0.1000, are vulnerable to a stack-based buffer overflow in the doka

References

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