Bug 1383382 (CVE-2015-8950)

Summary:	CVE-2015-8950 kernel: Missing cleaning of allocated buffers
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:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel which does not initialize certain data structures used by DMA transfer on ARM64 based systems. This could allow local users to obtain sensitive information from kernel memory by triggering a dma_mmap call and reconstructing the data.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-12-07 11:51:29 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:	1383384, 1395064
Bug Blocks:	1383398

Description Adam Mariš 2016-10-10 13:44:44 UTC

A flaw was found in the Linux kernel showed that some data structures used by DMA transfer on ARM64 based systems were not initialized.

This could allow local users to obtain sensitive information from kernel memory mapping and addresses by triggering a dma_mmap call and reconstructing the data.  This is considered a kernel information leak.  At this time there is no panic or denial of service that can be generated from this flaw, but this information could be used in gathering information to be used in further attacks.

Upstream patch:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6829e274a623187c24f7cfc0e3d35f25d087fcc5

Comment 1 Adam Mariš 2016-10-10 13:45:29 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1383384]

Comment 3 Wade Mealing 2016-11-15 03:59:44 UTC

Statement:

This issue doesn't affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5,6,7 and MRG-2. 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/.