Vulnerability Monitor

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CVE-2009-3527

Race condition in the Pipe (IPC) close function in FreeBSD 6.3 and 6.4 allows local users to cause a denial of service (crash) or gain privileges via vectors related to kqueues, which triggers a use after free, leading to a NULL pointer dereference or memory corruption.

Security Impact Summary

CVE-2009-3527 is a security vulnerability that . Impacting 1 product from freebsd organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2009, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2009-10-06T22:30:00.250

Last Modified

2026-04-23T00:35:47.467

Status

Modified

Source

[email protected]

Severity

CVSSv2: 6.9 (MEDIUM)

CVSSv2 Vector

AV:L/AC:M/Au:N/C:C/I:C/A:C

Access Vector: LOCAL
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.4

Impact Score

10.0

Weaknesses

Type: Primary
CWE-362

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	freebsd	freebsd	6.3	Yes
Operating System	freebsd	freebsd	6.4	Yes

References

http://osvdb.org/58544 ([email protected])
http://security.freebsd.org/advisories/FreeBSD-SA-09:13.pipe.asc Patch ([email protected])
http://www.securityfocus.com/archive/1/506449 Exploit ([email protected])
http://www.securityfocus.com/bid/36375 Patch ([email protected])
http://www.securitytracker.com/id?1022982 Patch ([email protected])
http://osvdb.org/58544 (af854a3a-2127-422b-91ae-364da2661108)
http://security.freebsd.org/advisories/FreeBSD-SA-09:13.pipe.asc Patch (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/506449 Exploit (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/36375 Patch (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id?1022982 Patch (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For freebsd's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.