Bug 1400468 (CVE-2016-9756)

Summary:	CVE-2016-9756 Kernel: kvm: stack memory information leakage
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aquini, arm-mgr, bhu, carnil, 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, 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:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:02:53 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:	1400469
Bug Blocks:	1398088

Description Prasad Pandit 2016-12-01 10:13:49 UTC

Linux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM) support
is vulnerable to an information leakage issue. It could occur on x86 platform,
while emulating instructions in 32bit mode.

A user/process could use this flaw to leak host kernel memory bytes.

Upstream patch:
---------------
  -> https://git.kernel.org/linus/2117d5398c81554fbf803f5fd1dc55eb78216c0c

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/12/01/1

Comment 1 Prasad Pandit 2016-12-01 10:14:58 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1400469]

Comment 2 Prasad Pandit 2016-12-01 10:30:32 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.

This has been rated as having Low security impact and is not currently planned
to be addressed in future updates. For additional information, refer to the
Red Hat Enterprise Linux Life Cycle:
  -> https://access.redhat.com/support/policy/updates/errata/