CVE-2002-1247: Buffer overflow in LISa allows local users to gain access to a raw socket via a long LOGNAME environment varia

Routine

HIGH 7.2DOWNGRADEDOWNGRADEMITIGATE

CVE-2002-1247 is a high-severity flaw (CVSS 7.2) affecting klisa, lisa, kde. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in LISa allows local users to gain access to a raw socket via a long LOGNAME environment variable for the resLISa daemon.

Why this priority

High severity

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

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Published	2002-11-29
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: kde · lisa

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

Am I affected?

Timeline

2002-11-29 05:00 UTCPublished CVE record published
2026-06-16 21:58 UTCUpdated Record last modified

kde klisa DOWNGRADE

Affected: 2.2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.2.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.2.2 (Debian / Ubuntu)

apt-cache madison klisa sudo apt install klisa=<VERSION_BEFORE_2.2.2> sudo apt-mark hold klisa

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

dnf --showduplicates list klisa sudo dnf downgrade klisa-<VERSION_BEFORE_2.2.2> sudo dnf versionlock add klisa

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.

lisa lisa DOWNGRADE

Affected: 0.1 · 0.1.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.1 (Debian / Ubuntu)

apt-cache madison lisa sudo apt install lisa=<VERSION_BEFORE_0.1> sudo apt-mark hold lisa

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

dnf --showduplicates list lisa sudo dnf downgrade lisa-<VERSION_BEFORE_0.1> sudo dnf versionlock add lisa

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.

kde kde MITIGATE

Affected: 2.0 · 2.1 · 2.2 · 3.0 · 3.0.1 · 3.0.2 · 3.0.3 · 3.0.3a

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

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.

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-2002-1247?

klisa: downgrade or apply the listed mitigation; lisa: downgrade or apply the listed mitigation; kde: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-1247 being exploited?

CVE-2002-1247 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-2002-1247 affect?

CVE-2002-1247 affects klisa, lisa, kde. Severity is high (CVSS 7.2). Buffer overflow in LISa allows local users to gain access to a raw socket via a long LOGNAME environment variable for the resLISa daemon.

How urgent is CVE-2002-1247?

Priority 36/100. High severity

References

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