Bug 1404924 (CVE-2016-9588) - CVE-2016-9588 Kernel: kvm: nVMX: uncaught software exceptions in L1 guest leads to DoS
Summary: CVE-2016-9588 Kernel: kvm: nVMX: uncaught software exceptions in L1 guest lea...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2016-9588
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1404925 1404928 1404929
Blocks: 1404612
TreeView+ depends on / blocked
 
Reported: 2016-12-15 06:33 UTC by Prasad Pandit
Modified: 2021-02-17 02:52 UTC (History)
30 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:04:27 UTC

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1842 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2017-08-01 18:22:09 UTC
Red Hat Product Errata RHSA-2017:2077 0 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 18:13:37 UTC

Description Prasad Pandit 2016-12-15 06:33:18 UTC 
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
--------------
  -> https://www.spinics.net/lists/kvm/msg142495.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/12/15/3
Comment 1 Prasad Pandit 2016-12-15 06:34:40 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1404925]
Comment 5 Prasad Pandit 2017-01-31 08:02:54 UTC 
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 19:11:49 UTC 
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 07:51:53 UTC 
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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