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Bug 607808 (CVE-2017-2596) - Kernel: kvm: page reference leakage in handle_vmon
Summary: Kernel: kvm: page reference leakage in handle_vmon
Status: UNCONFIRMED
Alias: CVE-2017-2596
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Security
URL: https://www.spinics.net/lists/kvm/msg...
Whiteboard: A3 [ebuild]
Keywords:
Depends on:
Blocks:
 
Reported: 2017-01-31 14:29 UTC by Francis Booth
Modified: 2017-01-31 14:35 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Francis Booth 2017-01-31 14:29:36 UTC
Linux kernel built with the KVM virtualisation support(CONFIG_KVM), with nested virtualisation(nVMX) feature enabled(nested=1), is vulnerable to host memory leakage issue. It could occur while emulating VMXON instruction in 'handle_vmon'.

A L1 guest user could use this flaw to leak host memory potentially resulting in DoS.

Upstream patch:
---------------
  -> https://www.spinics.net/lists/kvm/msg144319.html

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1417812


~ eleix (Security Padawan)


Reproducible: Didn't try