Vulnerability CVE-2016-3713
Published: 2016-06-27

Description:
The msr_mtrr_valid function in arch/x86/kvm/mtrr.c in the Linux kernel before 4.6.1 supports MSR 0x2f8, which allows guest OS users to read or write to the kvm_arch_vcpu data structure, and consequently obtain sensitive information or cause a denial of service (system crash), via a crafted ioctl call.

CVSS2 => (AV:L/AC:L/Au:N/C:P/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.6/10
7.8/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
Complete
Affected software
Linux -> Linux kernel 

 References:
https://github.com/torvalds/linux/commit/9842df62004f366b9fed2423e24df10542ee0dc5
https://bugzilla.redhat.com/show_bug.cgi?id=1332139
http://www.openwall.com/lists/oss-security/2016/05/16/2
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.1
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9842df62004f366b9fed2423e24df10542ee0dc5
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