Bug 1400457 (CVE-2015-8962)

Summary:	CVE-2015-8962 kernel: Double free vulnerability in SCSI driver
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aquini, bhu, dhoward, dvlasenk, fhrbata, gansalmon, iboverma, ichavero, itamar, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, madhu.chinakonda, mchehab, mcressma, nmurray, pholasek, rt-maint, rvrbovsk, williams, wmealing, 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 flaw was found in the Linux kernel SCSI subsystem, which allowed a local user to gain privileges or cause a denial of service (memory corruption and system crash) by issuing an SG_IO ioctl call while a device was being detached.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-27 10:53:59 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:	1406232, 1406233
Bug Blocks:	1395243

Description Adam Mariš 2016-12-01 09:47:07 UTC

A flaw was found in the Linux kernel SCSI subsystem, which allowed a local user to gain privileges or cause a denial of service (memory corruption and system crash) by issuing an SG_IO ioctl call while a device was being detached.

This could cause a situation in which a block request could be free'd twice.  An attacker could use this condition to crafted memory in the correct location which can be free'd then used again , causing memory corruption (crash) or privilege escalation.

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f3951a3709ff50990bf3e188c27d346792103432

Comment 2 Wade Mealing 2016-12-20 02:57:29 UTC


This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6 and may be addressed in future updates. 

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

This has been rated as having Moderate security impact and is 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/.