Bug 706323 (CVE-2011-1936)

Summary: CVE-2011-1936 kernel: xen: vmx: insecure cpuid vmexit
Product: [Other] Security Response Reporter: Petr Matousek <pmatouse>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dhoward, drjones, jrusnack, kernel-mgr, lwang, mrezanin, nobody, pbonzini, plougher, rkhan, security-response-team, sforsber
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2015-07-29 12:47:23 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 706324, 706325    
Bug Blocks: 718617    

Description Petr Matousek 2011-05-20 05:50:41 UTC 
A bug was found in the way Xen handles cpuid instruction emulation during VM exits. An unprivileged guest user can potentially use this flaw to crash the guest.

This issue only affects systems running on x86 architecture with Intel processor and VMX virtualization extension enabled.
Comment 2 Petr Matousek 2011-05-20 05:56:33 UTC 
Statement:

The versions of the Linux kernel as shipped with Red Hat Enterprise Linux 4, 6, and Red Hat Enterprise MRG are not affected. This has been addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2011-0927.html.

Also, only systems running on x86 architecture with Intel processor and VMX
virtualization extension enabled are affected.
Comment 5 errata-xmlrpc 2011-07-15 06:09:23 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:0927 https://rhn.redhat.com/errata/RHSA-2011-0927.html