Linux Kernel /dev/cpu/*/msr access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Linux Kernel (Operating System) (affected version not known). It has been rated as critical. Affected by this issue is some unknown processing of the file /dev/cpu/*/msr. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, and integrity.

The weakness was disclosed 02/05/2013 by Alan Cox with grsecurity as confirmed git commit (GIT Repository). The advisory is available at This vulnerability is handled as CVE-2013-0268 since 12/06/2012. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

A public exploit has been developed by spender in ANSI C and been published immediately after the advisory. It is declared as proof-of-concept. The exploit is available at The vulnerability scanner Nessus provides a plugin with the ID 68785 (Oracle Linux 5 : kernel (ELSA-2013-0621)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 216061 (VMware ESX 4.0.0 Patch Release ESX400-201310001 Missing (KB2059495)).

Applying the patch patch1 is able to eliminate this problem. The bugfix is ready for download at

The vulnerability is also documented in the databases at SecurityFocus (BID 57838), X-Force (81950), Secunia (SA52481), Vulnerability Center (SBV-38516) and Tenable (68785). The entries 7746, 7840 and 8923 are pretty similar.





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.1
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
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NVD Base Score: 🔍


Class: Privilege escalation
CWE: CWE-264
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: spender
Programming Language: 🔍
Download: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 68785
Nessus Name: Oracle Linux 5 : kernel (ELSA-2013-0621)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881684
OpenVAS Name: CentOS Update for kernel CESA-2013:0621 centos5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Patch
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Patch: patch1


12/06/2012 🔍
02/05/2013 +61 days 🔍
02/05/2013 +0 days 🔍
02/07/2013 +2 days 🔍
02/07/2013 +0 days 🔍
02/11/2013 +4 days 🔍
02/17/2013 +6 days 🔍
02/21/2013 +4 days 🔍
03/06/2013 +13 days 🔍
07/12/2013 +128 days 🔍
08/02/2013 +21 days 🔍
04/09/2017 +1346 days 🔍
05/04/2021 +1486 days 🔍



Researcher: Alan Cox
Organization: grsecurity
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-0268 (🔍)

SecurityFocus: 57838 - Linux Kernel 'MSR' Driver Local Privilege Escalation Vulnerability
Secunia: 52481 - Ubuntu update for kernel, Less Critical
X-Force: 81950
Vulnerability Center: 38516 - Linux Kernel <3.7.6 Local Application Execution due to a Flaw in the msr_open Function, High
OSVDB: 90003

scip Labs:
See also: 🔍


Created: 02/11/2013 03:32 PM
Updated: 05/04/2021 03:24 PM
Changes: (3) source_nessus_risk exploit_price_0day vulnerability_cvss2_nvd_basescore
Complete: 🔍
Committer: olku


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