CVE-2003-0269: Buffer overflow in youbin allows local users to gain privileges via a long HOME environment variable.

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HIGH 7.2DOWNGRADE

CVE-2003-0269 is a high-severity flaw (CVSS 7.2) affecting youbin. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in youbin allows local users to gain privileges via a long HOME environment variable.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Published	2003-05-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: youbin

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

Am I affected?

Timeline

2003-05-27 04:00 UTCPublished CVE record published
2026-06-16 22:01 UTCUpdated Record last modified

youbin youbin DOWNGRADE

Affected: 2.5 · 3.0 · 3.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.5 (Debian / Ubuntu)

apt-cache madison youbin sudo apt install youbin=<VERSION_BEFORE_2.5> sudo apt-mark hold youbin

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

dnf --showduplicates list youbin sudo dnf downgrade youbin-<VERSION_BEFORE_2.5> sudo dnf versionlock add youbin

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.

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: Youbin 2.5/3.0/3.4 - 'HOME' Buffer Overflow

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-2003-0269?

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

Is CVE-2003-0269 being exploited?

CVE-2003-0269 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-2003-0269 affect?

CVE-2003-0269 affects youbin. Severity is high (CVSS 7.2). Buffer overflow in youbin allows local users to gain privileges via a long HOME environment variable.

How urgent is CVE-2003-0269?

Priority 46/100. High severity; Public exploit reference

References

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