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Bug 1449980 - (CVE-2017-8831) CVE-2017-8831 kernel: Double fetch vulnerability in saa7164_bus_get function
CVE-2017-8831 kernel: Double fetch vulnerability in saa7164_bus_get function
Status: CLOSED WONTFIX
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=20170424,reported=2...
: Security
Depends On: 1449981 1452150
Blocks: 1449984
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Reported: 2017-05-11 05:45 EDT by Adam Mariš
Modified: 2018-01-29 12:24 EST (History)
33 users (show)

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Doc Text:
The saa7164_bus_get function in drivers/media/pci/saa7164/saa7164-bus.c in the Linux kernel through 4.10.14 allows local users to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact by changing a certain sequence-number value, aka a "double fetch" vulnerability.
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Environment:
Last Closed: 2017-05-18 08:38:01 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2017-05-11 05:45:36 EDT 
The saa7164_bus_get function in drivers/media/pci/saa7164/saa7164-bus.c in the Linux kernel through 4.10.14 allows local users to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact by changing a certain sequence-number value, aka a "double fetch" vulnerability.

Bug report:

https://bugzilla.kernel.org/show_bug.cgi?id=195559

Proposed patch:

https://bugzilla.kernel.org/show_bug.cgi?id=195559#c2
Comment 1 Adam Mariš 2017-05-11 05:46:25 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1449981]
Comment 4 Vladis Dronov 2017-05-18 08:38:01 EDT 
Statement:

This issue does not affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, as the code with the flaw is not present in this product.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise 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/.
Comment 6 Andrej Nemec 2017-06-26 04:40:31 EDT 
References:

http://seclists.org/bugtraq/2017/Jun/47
Comment 7 Justin M. Forbes 2018-01-29 12:24:00 EST 
This was fixed for Fedora with the 4.12.6 stable updates
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