CVE-2002-0794 — The accept_filter mechanism in FreeBSD 4 through 4.5 does not properly remove entries from the incomplete listen queue when adding a syncache, which allows remote attackers to cause a denial of service (network service availability) via a large number of connection attempts, which fills the queue

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MEDIUM

The accept_filter mechanism in FreeBSD 4 through 4.5 does not properly remove entries from the incomplete listen queue when adding a syncache, which allows remote attackers to cause a denial of service (network service availability) via a large number of connection attempts, which fills the queue

Published Apr 2, 2003

5.0

MEDIUM

CVSS 2.0

EPSS 1.63%

Description

The accept_filter mechanism in FreeBSD 4 through 4.5 does not properly remove entries from the incomplete listen queue when adding a syncache, which allows remote attackers to cause a denial of service (network service availability) via a large number of connection attempts, which fills the queue.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.63% 0.01632

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01632

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.63% (0.01632)	75.38th	v5 (v2026.06.15)
Jun 15, 2026	1.63% (0.01632)	73.07th	v5 (v2026.06.15)
Mar 17, 2025	0.90% (0.00900)	74.04th	v4 (v2025.03.14)
Dec 12, 2024	0.93% (0.00931)	83.68th	v3 (v2023.03.01)
Jan 29, 2024	0.93% (0.00931)	81.30th	v3 (v2023.03.01)
Mar 7, 2023	1.03% (0.01033)	81.57th	v3 (v2023.03.01)
Mar 6, 2023	1.21% (0.01213)	66.61th	v2 (v2022.01.01)
Feb 17, 2023	1.21% (0.01213)	66.22th	v2 (v2022.01.01)
Apr 1, 2022	1.21% (0.01213)	64.21th	v2 (v2022.01.01)
Feb 4, 2022	1.21% (0.01213)	40.54th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (4)

http://archives.neohapsis.com/archives/freebsd/2002-05/0349.html
vendor-advisoryx_refsource_FREEBSDPatchVendor Advisory
http://www.iss.net/security_center/static/9209.php
vdb-entryx_refsource_XFPatchVendor Advisory
http://www.osvdb.org/5081
vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/bid/4879
vdb-entryx_refsource_BIDPatchVendor Advisory

Link	Providers	Tags
http://archives.neohapsis.com/archives/freebsd/2002-05/0349.html		vendor-advisoryx_refsource_FREEBSDPatchVendor Advisory
http://www.iss.net/security_center/static/9209.php		vdb-entryx_refsource_XFPatchVendor Advisory
http://www.osvdb.org/5081		vdb-entryx_refsource_OSVDB
http://www.securityfocus.com/bid/4879		vdb-entryx_refsource_BIDPatchVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Apr 2, 2003

Updated Aug 8, 2024

Reserved Jul 25, 2002

Link CVE-2002-0794

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2002-0794

Red Hat

Severity n/a

Public date n/a

Links CVE-2002-0794