CVE-2015-6923: The ndvbs module in VBox Communications Satellite Express Protocol 2.3.17.3 allows local users to write to arb

This month

HIGH 7.2DOWNGRADE

CVE-2015-6923 is a high-severity flaw (CVSS 7.2) affecting satellite express protocol. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The ndvbs module in VBox Communications Satellite Express Protocol 2.3.17.3 allows local users to write to arbitrary physical memory locations and gain privileges via a 0x00000ffd ioctl call.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Published	2015-09-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: vboxcomm

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

Am I affected?

Timeline

2015-09-21 19:59 UTCPublished CVE record published
2026-06-17 00:31 UTCUpdated Record last modified

vboxcomm satellite express protocol DOWNGRADE

Affected: 2.3.17.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.17.3

1. Check installed version

apt-cache policy satellite-express-protocol || rpm -q satellite-express-protocol || satellite-express-protocol --version

2. No fixed release: DOWNGRADE to a release before 2.3.17.3 (Debian / Ubuntu)

apt-cache madison satellite-express-protocol sudo apt install satellite-express-protocol=<VERSION_BEFORE_2.3.17.3> sudo apt-mark hold satellite-express-protocol

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

dnf --showduplicates list satellite-express-protocol sudo dnf downgrade satellite-express-protocol-<VERSION_BEFORE_2.3.17.3> sudo dnf versionlock add satellite-express-protocol

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: VBox Satellite Express 2.3.17.3 - Arbitrary Write

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-2015-6923?

satellite express protocol: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-6923 being exploited?

CVE-2015-6923 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-2015-6923 affect?

CVE-2015-6923 affects satellite express protocol. Severity is high (CVSS 7.2). The ndvbs module in VBox Communications Satellite Express Protocol 2.3.17.3 allows local users to write to arbitrary physical memory locations and gain privileges via a 0x00000ffd ioctl call.

How urgent is CVE-2015-6923?

Priority 45/100. High severity; Public exploit reference

References

← Back to latest CVEs