CVE-2004-0093: XFree86 4.1.0 allows remote attackers to cause a denial of service and possibly execute arbitrary code via an

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HIGH 7.5DOWNGRADE

CVE-2004-0093 is a high-severity flaw (CVSS 7.5) affecting x11r6. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XFree86 4.1.0 allows remote attackers to cause a denial of service and possibly execute arbitrary code via an out-of-bounds array index when using the GLX extension and Direct Rendering Infrastructure (DRI).

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Published	2004-03-15
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: xfree86 project

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2004-03-15 05:00 UTCPublished CVE record published
2026-06-16 22:04 UTCUpdated Record last modified

xfree86 project x11r6 DOWNGRADE

Affected: 4.1.0 · 4.1.11 · 4.1.12 · 4.2.0 · 4.2.1 · 4.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.1.0

1. Check installed version

apt-cache policy x11r6 || rpm -q x11r6 || x11r6 --version

2. No fixed release: DOWNGRADE to a release before 4.1.0 (Debian / Ubuntu)

apt-cache madison x11r6 sudo apt install x11r6=<VERSION_BEFORE_4.1.0> sudo apt-mark hold x11r6

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

dnf --showduplicates list x11r6 sudo dnf downgrade x11r6-<VERSION_BEFORE_4.1.0> sudo dnf versionlock add x11r6

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-2004-0093?

x11r6: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-0093 being exploited?

CVE-2004-0093 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-2004-0093 affect?

CVE-2004-0093 affects x11r6. Severity is high (CVSS 7.5). XFree86 4.1.0 allows remote attackers to cause a denial of service and possibly execute arbitrary code via an out-of-bounds array index when using the GLX extension and Direct Rendering Infrastructure (DRI).

How urgent is CVE-2004-0093?

Priority 48/100. High severity

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References

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