CVE-2006-4516 — Integer signedness error in FreeBSD 6.0-RELEASE allows local users to cause a denial of service (memory corruption and kernel panic) via a PT_LWPINFO ptrace command with a large negative data value that satisfies a signed maximum value check but is used in an unsigned copyout function call

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MEDIUM

Integer signedness error in FreeBSD 6.0-RELEASE allows local users to cause a denial of service (memory corruption and kernel panic) via a PT_LWPINFO ptrace command with a large negative data value that satisfies a signed maximum value check but is used in an unsigned copyout function call

Published Oct 12, 2006

4.9

MEDIUM

CVSS 2.0

EPSS 0.81%

Description

Integer signedness error in FreeBSD 6.0-RELEASE allows local users to cause a denial of service (memory corruption and kernel panic) via a PT_LWPINFO ptrace command with a large negative data value that satisfies a signed maximum value check but is used in an unsigned copyout function call.

Affected products

Remediation

No remediation recorded yet.

Metrics

0.81% 0.00812

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

EPSS probability 0.00812

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	0.81% (0.00812)	55.41th	v5 (v2026.06.15)
Jun 15, 2026	0.78% (0.00783)	51.06th	v5 (v2026.06.15)
Mar 17, 2025	0.19% (0.00186)	38.21th	v4 (v2025.03.14)
Dec 12, 2024	0.04% (0.00043)	11.52th	v3 (v2023.03.01)
Jun 12, 2024	0.04% (0.00043)	9.60th	v3 (v2023.03.01)
Mar 7, 2023	0.04% (0.00043)	7.57th	v3 (v2023.03.01)
Mar 6, 2023	1.76% (0.01761)	76.53th	v2 (v2022.01.01)
Feb 23, 2023	1.76% (0.01761)	76.48th	v2 (v2022.01.01)
Apr 1, 2022	1.76% (0.01761)	74.44th	v2 (v2022.01.01)
Feb 4, 2022	1.76% (0.01761)	53.69th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (4)

http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=419
third-party-advisoryx_refsource_IDEFENSEPatchVendor Advisory
http://secunia.com/advisories/22367
third-party-advisoryx_refsource_SECUNIA
http://www.securityfocus.com/bid/20440
vdb-entryx_refsource_BID
https://exchange.xforce.ibmcloud.com/vulnerabilities/29476
vdb-entryx_refsource_XF

Link	Providers	Tags
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=419		third-party-advisoryx_refsource_IDEFENSEPatchVendor Advisory
http://secunia.com/advisories/22367		third-party-advisoryx_refsource_SECUNIA
http://www.securityfocus.com/bid/20440		vdb-entryx_refsource_BID
https://exchange.xforce.ibmcloud.com/vulnerabilities/29476		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Oct 12, 2006

Updated Aug 7, 2024

Reserved Aug 31, 2006

Link CVE-2006-4516

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2006-4516

Red Hat

Severity n/a

Public date n/a

Links CVE-2006-4516