Bug 1383391 (CVE-2015-8955)

Summary:	CVE-2015-8955 kernel: Possible privilege escalation via groups spanning multiple HW PMUs
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	agordeev, aquini, arm-mgr, bhu, dhoward, esammons, fhrbata, gansalmon, iboverma, ichavero, itamar, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, nmurray, pholasek, plougher, rt-maint, rvrbovsk, vdronov, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.1-rc1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-10-14 14:20:10 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:	1383393
Bug Blocks:	1383399

Description Adam Mariš 2016-10-10 14:07:20 UTC

A flaw was found in the Linux kernel in versions before 4.1 on arm64 platforms allows local users to gain privileges or cause a denial of service (invalid pointer dereference) via vectors involving events that are mishandled during a span of multiple HW PMUs.

Upstream patch:

https://github.com/torvalds/linux/commit/8fff105e13041e49b82f92eef034f363a6b1c071

Related:

https://source.android.com/security/bulletin/2016-10-01.html

https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-8955

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8955

Comment 1 Adam Mariš 2016-10-10 14:08:36 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1383393]

Comment 2 Vladis Dronov 2016-10-14 14:14:44 UTC

Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. 6, 7 and Red Hat Enterprise MRG-2 as the code with the flaw is not present in the products listed.