Bug 1400804 (CVE-2016-9777)

Summary:	CVE-2016-9777 Kernel: kvm: out of bounds memory access via vcpu_id
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	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, 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 03:02:58 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:	1400805
Bug Blocks:	1398090

Description Prasad Pandit 2016-12-02 06:37:05 UTC

Linux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM) support
is vulnerable to an out-of-bounds memory access issue. It could occur on x86
platform, while servicing I/O APIC requests with larger vcpu_id.

A guest user/process could use this flaw to crash the host kernel resulting in
DoS or it could potentially be used to escalate privileges on a host.

Upstream patch:
---------------
  -> https://git.kernel.org/linus/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755

Reference:
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  -> http://www.openwall.com/lists/oss-security/2016/12/02/2

Comment 1 Prasad Pandit 2016-12-02 06:38:15 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1400805]

Comment 3 Prasad Pandit 2016-12-02 06:41:46 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.