CVE-2003-0396: Buffer overflow in les for ATM on Linux (linux-atm) before 2.4.1, if used setuid, allows local users to gain p

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MEDIUM 4.6WATCHLISTDOWNGRADE

CVE-2003-0396 is a medium-severity flaw (CVSS 4.6) affecting linux-atm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in les for ATM on Linux (linux-atm) before 2.4.1, if used setuid, allows local users to gain privileges via a long -f command line argument.

Why this priority

Public exploit reference
On your watchlist

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

Risk facts

CVSS score	4.6 (Medium)
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Published	2003-07-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: linux-atm

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

Am I affected?

Timeline

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

linux-atm linux-atm DOWNGRADE

Affected: 2.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4

1. Check installed version

apt-cache policy linux-atm || rpm -q linux-atm || linux-atm --version

2. No fixed release: DOWNGRADE to a release before 2.4 (Debian / Ubuntu)

apt-cache madison linux-atm sudo apt install linux-atm=<VERSION_BEFORE_2.4> sudo apt-mark hold linux-atm

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

dnf --showduplicates list linux-atm sudo dnf downgrade linux-atm-<VERSION_BEFORE_2.4> sudo dnf versionlock add linux-atm

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: Linux-ATM LES 2.4 - Command Line Argument 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-2003-0396?

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

Is CVE-2003-0396 being exploited?

CVE-2003-0396 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-2003-0396 affect?

CVE-2003-0396 affects linux-atm. Severity is medium (CVSS 4.6). Buffer overflow in les for ATM on Linux (linux-atm) before 2.4.1, if used setuid, allows local users to gain privileges via a long -f command line argument.

How urgent is CVE-2003-0396?

Priority 42/100. Public exploit reference; On your watchlist

References

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