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Bug 1383382 - (CVE-2015-8950) CVE-2015-8950 kernel: Missing cleaning of allocated buffers
CVE-2015-8950 kernel: Missing cleaning of allocated buffers
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160128,reported=2...
: Security
Depends On: 1383384 1395064
Blocks: 1383398
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Reported: 2016-10-10 09:44 EDT by Adam Mariš
Modified: 2016-12-07 06:51 EST (History)
35 users (show)

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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.
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Last Closed: 2016-12-07 06:51:29 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2016-10-10 09:44:44 EDT 
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 09:45:29 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1383384]
Comment 3 Wade Mealing 2016-11-14 22:59:44 EST 
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/.
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