Bug 1393350 (CVE-2016-8630)

Summary:	CVE-2016-8630 kernel: kvm: x86: NULL pointer dereference during instruction decode
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
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, ppandit, rt-maint, rvrbovsk, slawomir, 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 Kernel-based Virtual Machine (CONFIG_KVM) support is vulnerable to a null pointer dereference flaw. It could occur on x86 platform, when emulating an undefined instruction. An attacker could use this flaw to crash the host kernel resulting in DoS.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:01:53 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:	1393358, 1395805, 1395806, 1395807, 1395808
Bug Blocks:	1389721

Description Adam Mariš 2016-11-09 11:39:01 UTC

Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support is vulnerable to a null pointer dereference flaw. It could occur on x86 platform,
when emulating an undefined instruction.

A user/process could use this flaw to crash the host kernel resulting in DoS.

Upstream patch:
---------------
  -> https://git.kernel.org/linus/d9092f52d7e61dd1557f2db2400ddb430e85937e

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/11/22/3

Comment 2 Adam Mariš 2016-11-09 11:57:10 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1393358]

Comment 5 Prasad Pandit 2016-11-22 07:57:33 UTC

Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.

This issue affects the version of Linux kernel as shipped with Red Hat Enterprise
Linux 7. Future kernel updates for Red Hat Enterprise Linux 7 may address this
issue.

Comment 9 errata-xmlrpc 2017-03-02 17:14:30 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0386 https://rhn.redhat.com/errata/RHSA-2017-0386.html

Comment 10 errata-xmlrpc 2017-03-02 17:23:59 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0387 https://rhn.redhat.com/errata/RHSA-2017-0387.html