CVE-2009-3621

Publication date 22 October 2009

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

net/unix/af_unix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a denial of service (system hang) by creating an abstract-namespace AF_UNIX listening socket, performing a shutdown operation on this socket, and then performing a series of connect operations to this socket.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
linux	9.10 karmic	Fixed 2.6.31-16.52
	9.04 jaunty	Fixed 2.6.28-17.58
	8.10 intrepid	Fixed 2.6.27-16.44
	8.04 LTS hardy	Fixed 2.6.24-26.64
	6.06 LTS dapper	Not in release
linux-source-2.6.15	9.10 karmic	Not in release
	9.04 jaunty	Not in release
	8.10 intrepid	Not in release
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Fixed 2.6.15-55.81

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.5 · Medium

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	5.5 · Medium
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-864-1
Linux kernel vulnerabilities
5 December 2009

Other references

https://www.cve.org/CVERecord?id=CVE-2009-3621