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Bug 1400457 - (CVE-2015-8962) CVE-2015-8962 kernel: Double free vulnerability in SCSI driver
CVE-2015-8962 kernel: Double free vulnerability in SCSI driver
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20151103,repor...
: Security
Depends On: 1406232 1406233
Blocks: 1395243
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Reported: 2016-12-01 04:47 EST by Adam Mariš
Modified: 2018-08-28 18:10 EDT (History)
34 users (show)

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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.
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Description Adam Mariš 2016-12-01 04:47:07 EST 
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 2016-12-19 21:57:29 EST 

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/.
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