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.
References (5)
Core 5
Core References
Vendor Advisory x_refsource_confirm
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.1
Vendor Advisory x_refsource_confirm
https://github.com/torvalds/linux/commit/9842df62004f366b9fed2423e24df10542ee0dc5
Mailing List mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2016/05/16/2
Vendor Advisory x_refsource_confirm
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9842df62004f366b9fed2423e24df10542ee0dc5
Issue Tracking x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1332139
Scores
CVSS v3
7.1
EPSS
0.0034
EPSS Percentile
26.5%
Attack Vector
LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Details
CWE
CWE-284
Status
published
Products (1)
linux/linux_kernel
< 4.6
Published
Jun 27, 2016
Tracked Since
Feb 18, 2026