Bug 1735633 (CVE-2016-10764)

Summary:	CVE-2016-10764 kernel: off by one in function cqspi_setup_flash() in drivers/mtd/spi-nor/cadence-quadspi.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, airlied, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, steved, williams, yozone
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 vulnerability was found in Linux Kernel, there is an off by one in the drivers/mtd/spi-nor/cadence-quadspi.c cqspi_setup_flash() function. A local attacker who is able to trigger the device probe mechanism of a cadence quadspi Memory Technology Device may be able to corrupt memory or possibly escalate privileges.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-11-20 18:51:34 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:	1735634
Bug Blocks:	1735635

Description Dhananjay Arunesh 2019-08-01 07:48:29 UTC

A vulnerability was found in Linux Kernel, there is an off by one in the drivers/mtd/spi-nor/cadence-quadspi.c cqspi_setup_flash() function. There are CQSPI_MAX_CHIPSELECT elements in the ->f_pdata array so the ">" should be ">=" instead.

Reference:
https://github.com/torvalds/linux/commit/193e87143c290ec16838f5368adc0e0bc94eb931
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=193e87143c290ec16838f5368adc0e0bc94eb931

Comment 1 Dhananjay Arunesh 2019-08-01 07:49:02 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1735634]

Comment 2 Justin M. Forbes 2019-08-01 12:36:45 UTC

This was fixed for Fedora in 4.9.6 and never impacted any currently supported Fedora releases.

Comment 6 Product Security DevOps Team 2019-11-20 18:51:34 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2016-10764