CVE-2002-0164: Vulnerability in the MIT-SHM extension of the X server on Linux (XFree86) 4.2.1 and earlier allows local users

Routine

MEDIUM 4.6WATCHLISTDOWNGRADEDOWNGRADE

CVE-2002-0164 is a medium-severity flaw (CVSS 4.6) affecting openlinux server, openlinux workstation. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in the MIT-SHM extension of the X server on Linux (XFree86) 4.2.1 and earlier allows local users to read and write arbitrary shared memory, possibly to cause a denial of service or gain privileges.

Why this priority

On your watchlist

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

Risk facts

CVSS score	4.6 (Medium)
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Published	2002-03-15
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: caldera

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

Am I affected?

Timeline

2002-03-15 05:00 UTCPublished CVE record published
2026-06-16 21:56 UTCUpdated Record last modified

caldera openlinux server DOWNGRADE

Affected: 3.1 · 3.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1

1. Check installed version

apt-cache policy openlinux-server || rpm -q openlinux-server || openlinux-server --version

2. No fixed release: DOWNGRADE to a release before 3.1 (Debian / Ubuntu)

apt-cache madison openlinux-server sudo apt install openlinux-server=<VERSION_BEFORE_3.1> sudo apt-mark hold openlinux-server

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

dnf --showduplicates list openlinux-server sudo dnf downgrade openlinux-server-<VERSION_BEFORE_3.1> sudo dnf versionlock add openlinux-server

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.

caldera openlinux workstation DOWNGRADE

Affected: 3.1 · 3.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1

1. Check installed version

apt-cache policy openlinux-workstation || rpm -q openlinux-workstation || openlinux-workstation --version

2. No fixed release: DOWNGRADE to a release before 3.1 (Debian / Ubuntu)

apt-cache madison openlinux-workstation sudo apt install openlinux-workstation=<VERSION_BEFORE_3.1> sudo apt-mark hold openlinux-workstation

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

dnf --showduplicates list openlinux-workstation sudo dnf downgrade openlinux-workstation-<VERSION_BEFORE_3.1> sudo dnf versionlock add openlinux-workstation

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-2002-0164?

openlinux server: downgrade or apply the listed mitigation; openlinux workstation: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-0164 being exploited?

CVE-2002-0164 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-2002-0164 affect?

CVE-2002-0164 affects openlinux server, openlinux workstation. Severity is medium (CVSS 4.6). Vulnerability in the MIT-SHM extension of the X server on Linux (XFree86) 4.2.1 and earlier allows local users to read and write arbitrary shared memory, possibly to cause a denial of service or gain privileges.

How urgent is CVE-2002-0164?

Priority 30/100. On your watchlist

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References

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