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Bug 1404924 - (CVE-2016-9588) CVE-2016-9588 Kernel: kvm: nVMX: uncaught software exceptions in L1 guest leads to DoS
CVE-2016-9588 Kernel: kvm: nVMX: uncaught software exceptions in L1 guest lea...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20161214,repor...
: Security
Depends On: 1404925 1404928 1404929
Blocks: 1404612
  Show dependency tree / graph
 
Reported: 2016-12-15 01:33 EST by Prasad J Pandit
Modified: 2018-08-28 18:11 EDT (History)
32 users (show)

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Doc Text:
Linux kernel built with the KVM visualization support (CONFIG_KVM), with nested visualization(nVMX) feature enabled(nested=1), is vulnerable to an uncaught exception issue. It could occur if an L2 guest was to throw an exception which is not handled by an L1 guest.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1842 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2017-08-01 14:22:09 EDT
Red Hat Product Errata RHSA-2017:2077 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 14:13:37 EDT

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Description Prasad J Pandit 2016-12-15 01:33:18 EST 
Linux kernel built with the KVM virtualisation support(CONFIG_KVM), with
nested virtualisation(nVMX) feature enabled(nested=1), is vulnerable to an uncaught exceptions issue. It could occur if a L2 guest was to throw an
exception which is not handled by L1 guest.

A L1 guest user could use this flaw to crash the guest resulting in DoS.

Upstream patch
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  -> https://www.spinics.net/lists/kvm/msg142495.html

Reference:
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  -> http://www.openwall.com/lists/oss-security/2016/12/15/3
Comment 1 Prasad J Pandit 2016-12-15 01:34:40 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1404925]
Comment 5 Prasad J Pandit 2017-01-31 03:02:54 EST 
Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Comment 7 errata-xmlrpc 2017-08-01 15:11:49 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077
Comment 8 errata-xmlrpc 2017-08-02 03:51:53 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842
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