CVE-2002-1317: Buffer overflow in Dispatch() routine for XFS font server (fs.auto) on Solaris 2.5.1 through 9 allows remote a

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HIGH 7.5DOWNGRADEMITIGATEMITIGATE

CVE-2002-1317 is a high-severity flaw (CVSS 7.5) affecting x11r6, irix, hp-ux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in Dispatch() routine for XFS font server (fs.auto) on Solaris 2.5.1 through 9 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a certain XFS query.

Why this priority

High severity
EPSS top 2%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	24.0% (top 2%)
CISA exploited list	No
Published	2002-12-11
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: hp · sgi · sun · xfree86 project

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

Am I affected?

Timeline

2002-12-11 05:00 UTCPublished CVE record published
2026-06-16 21:59 UTCUpdated Record last modified

xfree86 project x11r6 DOWNGRADE

Affected: 3.3 · 3.3.2 · 3.3.3 · 3.3.4 · 3.3.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.3 (Debian / Ubuntu)

apt-cache madison x11r6 sudo apt install x11r6=<VERSION_BEFORE_3.3> sudo apt-mark hold x11r6

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

dnf --showduplicates list x11r6 sudo dnf downgrade x11r6-<VERSION_BEFORE_3.3> 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.

sgi irix MITIGATE

Affected: 6.5 · 6.5.1 · 6.5.2 · 6.5.3 · 6.5.4 · 6.5.5 · 6.5.6 · 6.5.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.5

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.

hp hp-ux MITIGATE

Affected: 10.10 · 10.20 · 10.24 · 11.00 · 11.04 · 11.11 · 11.22

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.10

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: 2.5.1 · 2.6 · 7.0 · 8.0 · 9.0 · 9.0 x86_update_2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.5.1

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 sunos MITIGATE

Affected: all versions · 5.5.1 · 5.7 · 5.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.5.1

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: XFree86 X11R6 3.3.x - Font Server Remote Buffer Overrun

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-2002-1317?

x11r6: downgrade or apply the listed mitigation; irix: mitigate or apply the listed mitigation; hp-ux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-1317 being exploited?

CVE-2002-1317 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-2002-1317 affect?

CVE-2002-1317 affects x11r6, irix, hp-ux. Severity is high (CVSS 7.5). Buffer overflow in Dispatch() routine for XFS font server (fs.auto) on Solaris 2.5.1 through 9 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a certain XFS query.

How urgent is CVE-2002-1317?

Priority 56/100. High severity; EPSS top 2%: very likely to be exploited; Public exploit reference

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References

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