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Bug 1389259 - (CVE-2016-9084) CVE-2016-9084 kernel: Integer overflow when using kzalloc in vfio driver
CVE-2016-9084 kernel: Integer overflow when using kzalloc in vfio 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=20161012,repor...
: Security
Depends On: 1389285 1394991 1394992 1394994 1394995 1394997 1394998
Blocks: 1389281
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Reported: 2016-10-27 05:58 EDT by Adam Mariš
Modified: 2018-08-28 18:09 EDT (History)
34 users (show)

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Doc Text:
The use of a kzalloc with an integer multiplication allowed an integer overflow condition to be reached in vfio_pci_intrs.c. This combined with CVE-2016-9083 may allow an attacker to craft an attack and use unallocated memory, potentially crashing the machine.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:0386 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2017-03-02 17:06:10 EST
Red Hat Product Errata RHSA-2017:0387 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-03-02 17:06:22 EST

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Description Adam Mariš 2016-10-27 05:58:03 EDT 
The use of a kzalloc with an integer multiplication allowed an integer overflow condition to be reached in vfio_pci_intrs.c. This combined with CVE-2016-9083 may allow an attacker to craft an attack and use unallocated memory, potentially crashing the machine.   This issue is related to CVE-2016-9083 (bugzilla.redhat.com/CVE-2016-9083 )

Proposed patch:

https://patchwork.kernel.org/patch/9373631/

CVE assignment:

http://seclists.org/oss-sec/2016/q4/251
Comment 1 Adam Mariš 2016-10-27 07:26:30 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1389285]
Comment 2 Wade Mealing 2016-11-14 03:03:27 EST 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7. 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/.
Comment 9 errata-xmlrpc 2017-03-02 12:14:09 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0386 https://rhn.redhat.com/errata/RHSA-2017-0386.html
Comment 10 errata-xmlrpc 2017-03-02 12:23:41 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0387 https://rhn.redhat.com/errata/RHSA-2017-0387.html
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