Linux Kernel 'x86_assign_hw_event()' Local Denial of Service Vulnerability

Bugtraq ID:	48580
Class:	Design Error
CVE:	CVE-2011-2521
Remote:	No
Local:	Yes
Published:	Jul 06 2011 12:00AM
Updated:	Nov 15 2011 12:48AM
Credit:	Arun Sharma
Vulnerable:	Red Hat Enterprise Linux Workstation 6 Red Hat Enterprise Linux Server 6 Red Hat Enterprise Linux HPC Node 6 Red Hat Enterprise Linux Desktop 6 Oracle Enterprise Linux 6 OpenVZ Project OpenVZ 042stab037.1 Linux kernel 2.6.38 Linux kernel 2.6.38.6 Linux kernel 2.6.38.4 Linux kernel 2.6.38.3 Linux kernel 2.6.38.2 Linux kernel 2.6.38-rc7 Linux kernel 2.6.38-rc4 Linux kernel 2.6.38-rc2
Not Vulnerable:	OpenVZ Project OpenVZ 042stab039.10 Linux kernel 2.6.38-git18

Linux Kernel 'x86_assign_hw_event()' Local Denial of Service Vulnerability

The Linux kernel is prone to a local denial-of-service vulnerability.

Attackers can exploit this issue to cause the kernel to crash, denying service to legitimate users.

Linux Kernel 'x86_assign_hw_event()' Local Denial of Service Vulnerability

Currently we are not aware of any working exploits. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Linux Kernel 'x86_assign_hw_event()' Local Denial of Service Vulnerability

Solution:
Updates are available. Please see the references for more information.

Linux Kernel 'x86_assign_hw_event()' Local Denial of Service Vulnerability

References:

• perf, x86: Fix Intel fixed counters base initialization (Stephane Eranian)
  
• Bug 719228 - (CVE-2011-2521) CVE-2011-2521 kernel: perf, x86: fix Intel fixed co (Eugene Teo)
  
• Download/kernel/rhel6/042stab039.10 (OpenVZ Project)
  
• Linux kernel Homepage (kernel.org)