CVE-2002-1563

No known exploitation. EPSS puts it in the 25th percentile. A vendor fix is available.

CVSS 2.01.2Low EPSS percentile25th0.3% chance in 30 days CISA KEVNot listedNo confirmed exploitation
No public exploit known FixVendor fixNo build named by the sources

Published 2003-04-26Updated 2026-04-16Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

What it is

From the CVE record

stunnel 4.0.3 and earlier allows attackers to cause a denial of service (crash) via SIGCHLD signal handler race conditions that cause an inconsistency in the child counter.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS25th

CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.3% chance of exploitation activity in the next 30 days, which ranks it in the 25th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

4 events over 8391 days, from the signal feeds we watch.

2026-04-16Patch availablerecord updated
2003-04-26Publishedweakness classified

Affected products

stunneloss-project
- stunnelOn-premNetworking Infrastructure
Red Hat Inc.commercial · USaka red hat
- Red Hat Enterprise LinuxOSOn-premOperating Systems / linux-distro

And 1 more affected product. See all after sign-in

Technical detail

CVSS 2.0 vector

Open in the CVSS calculator

AV:L/AC:H/Au:N/C:N/I:N/A:P

Scored 1.2 by NVD.

How it is reached

Access Vector LocalRequires local access
Access Complexity HighSpecialized conditions required
Authentication NoneNo authentication required

Impact if exploited

Confidentiality NoneNo confidentiality impact
Integrity NoneNo integrity impact
Availability PartialReduced performance or service disruption

Weaknesses

NVD-CWE-OtherNo name in the record

Sources

References in the record

And 6 more references. See all after sign-in

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