CVE-2003-0451: Multiple buffer overflows in xbl before 1.0k allow local users to gain privileges via certain long command lin

Q: How do I fix CVE-2003-0451?

xbl: upgrade to newer than 1.0j. Exact commands for each OS are on this page.

Q: Is CVE-2003-0451 being exploited?

CVE-2003-0451 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2003-0451 affect?

CVE-2003-0451 affects xbl. Severity is medium (CVSS 4.6). Multiple buffer overflows in xbl before 1.0k allow local users to gain privileges via certain long command line arguments.

Q: How urgent is CVE-2003-0451?

Priority 24/100. No elevated risk signals yet.

Routine

MEDIUM 4.6UPGRADE

CVE-2003-0451 is a medium-severity flaw (CVSS 4.6) affecting xbl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple buffer overflows in xbl before 1.0k allow local users to gain privileges via certain long command line arguments.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.6 (Medium)
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Published	2003-08-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: xblockout

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

Am I affected?

Timeline

2003-08-07 04:00 UTCPublished CVE record published
2026-06-16 22:02 UTCUpdated Record last modified

xblockout xbl UPGRADE

Affected: <= 1.0j

Fixed in: newer than 1.0j

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.0j (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade xbl

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xbl

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2003-0451?

xbl: upgrade to newer than 1.0j. Exact commands for each OS are on this page.

Is CVE-2003-0451 being exploited?

CVE-2003-0451 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-2003-0451 affect?

CVE-2003-0451 affects xbl. Severity is medium (CVSS 4.6). Multiple buffer overflows in xbl before 1.0k allow local users to gain privileges via certain long command line arguments.

How urgent is CVE-2003-0451?

Priority 24/100. No elevated risk signals yet.

Related CVEs

CVE-2003-0535 HIGH 7.2 DOWNGRADE Buffer overflow in xbl 1.0k and earlier allows local users to gain privileges via a long -display command line

References

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