Bug 1449980 (CVE-2017-8831) - CVE-2017-8831 kernel: Double fetch vulnerability in saa7164_bus_get function
Summary: CVE-2017-8831 kernel: Double fetch vulnerability in saa7164_bus_get function
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2017-8831
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1449981 1452150
Blocks: 1449984
TreeView+ depends on / blocked
 
Reported: 2017-05-11 09:45 UTC by Adam Mariš
Modified: 2021-06-02 07:45 UTC (History)
34 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
The saa7164_bus_get function in drivers/media/pci/saa7164/saa7164-bus.c in the Linux kernel allows users able to plant rogue PCI device on the system 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.
Clone Of:
Environment:
Last Closed: 2017-05-18 12:38:01 UTC
Embargoed:

Attachments (Terms of Use)

Description Adam Mariš 2017-05-11 09:45:36 UTC 
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 09:46:25 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1449981]
Comment 4 Vladis Dronov 2017-05-18 12:38:01 UTC 
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 08:40:31 UTC 
References:

http://seclists.org/bugtraq/2017/Jun/47
Comment 7 Justin M. Forbes 2018-01-29 17:24:00 UTC 
This was fixed for Fedora with the 4.12.6 stable updates
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