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

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVE-2009-3621

Cvss 3 Severity Score

Description

Status

Severity score breakdown

References

Related Ubuntu Security Notices (USN)

Other references