Bug 1404924 (CVE-2016-9588)

Summary:	CVE-2016-9588 Kernel: kvm: nVMX: uncaught software exceptions in L1 guest leads to DoS
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aquini, arm-mgr, bhu, dhoward, fhrbata, gansalmon, iboverma, ichavero, itamar, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, madhu.chinakonda, matt, mchehab, mcressma, nmurray, pholasek, plougher, rt-maint, rvrbovsk, sztsian, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:04:27 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1404925, 1404928, 1404929
Bug Blocks:	1404612

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