CVE-2006-0745: X.Org server (xorg-server) 1.0.0 and later, X11R6.9.0, and X11R7.0 inadvertently treats the address of the get

This month

HIGH 7.2WATCHLISTDOWNGRADEDOWNGRADEMITIGATE

CVE-2006-0745 is a high-severity flaw (CVSS 7.2) affecting x11r6, x11r7, mandrake linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

X.Org server (xorg-server) 1.0.0 and later, X11R6.9.0, and X11R7.0 inadvertently treats the address of the geteuid function as if it is the return value of a call to geteuid, which allows local users to bypass intended restrictions and (1) execute arbitrary code via the -modulepath command line option or (2) overwrite arbitrary files via -logfile.

Why this priority

High severity
Public exploit reference
On your watchlist

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

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Published	2006-03-21
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: mandrakesoft · redhat · sun · suse · x.org

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

Am I affected?

Timeline

2006-03-21 02:06 UTCPublished CVE record published
2026-06-16 22:21 UTCUpdated Record last modified

x.org x11r6 DOWNGRADE

Affected: 6.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.9

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.9 (Debian / Ubuntu)

apt-cache madison x11r6 sudo apt install x11r6=<VERSION_BEFORE_6.9> sudo apt-mark hold x11r6

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

dnf --showduplicates list x11r6 sudo dnf downgrade x11r6-<VERSION_BEFORE_6.9> 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.

x.org x11r7 DOWNGRADE

Affected: 1.0 · 1.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy x11r7 || rpm -q x11r7 || x11r7 --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison x11r7 sudo apt install x11r7=<VERSION_BEFORE_1.0> sudo apt-mark hold x11r7

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

dnf --showduplicates list x11r7 sudo dnf downgrade x11r7-<VERSION_BEFORE_1.0> sudo dnf versionlock add x11r7

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.

mandrakesoft mandrake linux MITIGATE

Affected: 2006

Fixed in: no fixed release known

Safe to downgrade to: a release before 2006

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat fedora core MITIGATE

Affected: core_5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before core_5.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

sun solaris MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

suse suse linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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: X.Org X11 (X11R6.9.0/X11R7.0) - Local Privilege Escalation

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-2006-0745?

x11r6: downgrade or apply the listed mitigation; x11r7: downgrade or apply the listed mitigation; mandrake linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-0745 being exploited?

CVE-2006-0745 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-2006-0745 affect?

CVE-2006-0745 affects x11r6, x11r7, mandrake linux. Severity is high (CVSS 7.2). X.Org server (xorg-server) 1.0.0 and later, X11R6.9.0, and X11R7.0 inadvertently treats the address of the geteuid function as if it is the return value of a call to geteuid, which allows local users to bypass intended restrictions and (1)

How urgent is CVE-2006-0745?

Priority 52/100. High severity; Public exploit reference; On your watchlist

Related CVEs

CVE-2007-1351 HIGH 8.5 MITIGATE DOWNGRADE Integer overflow in the bdfReadCharacters function in bdfread.c in (1) X.Org libXfont before 20070403 and (2)
CVE-2006-4447 HIGH 7.2 DOWNGRADE DOWNGRADE X.Org and XFree86, including libX11, xdm, xf86dga, xinit, xload, xtrans, and xterm, does not check the return
CVE-2006-1526 LOW 2.1 DOWNGRADE Buffer overflow in the X render (Xrender) extension in X.org X server 6.8.0 up to allows attackers to cause a
CVE-2005-0605 HIGH 7.5 DOWNGRADE DOWNGRADE scan.c for LibXPM may allow attackers to execute arbitrary code via a negative bitmap_unit value that leads to
CVE-2004-0914 HIGH 10.0 DOWNGRADE DOWNGRADE Multiple vulnerabilities in libXpm for 6.8.1 and earlier, as used in XFree86 and other packages, include (1) m

References

← Back to latest CVEs