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Bug 1400804 - (CVE-2016-9777) CVE-2016-9777 Kernel: kvm: out of bounds memory access via vcpu_id
CVE-2016-9777 Kernel: kvm: out of bounds memory access via vcpu_id
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20161123,repo...
: Security
Depends On: 1400805
Blocks: 1398090
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Reported: 2016-12-02 01:37 EST by Prasad J Pandit
Modified: 2018-08-28 18:10 EDT (History)
31 users (show)

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Description Prasad J Pandit 2016-12-02 01:37:05 EST 
Linux kernel built with the Kernel-based Virtual Machine(CONFIG_KVM) support
is vulnerable to an out-of-bounds memory access issue. It could occur on x86
platform, while servicing I/O APIC requests with larger vcpu_id.

A guest user/process could use this flaw to crash the host kernel resulting in
DoS or it could potentially be used to escalate privileges on a host.

Upstream patch:
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  -> https://git.kernel.org/linus/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755

Reference:
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  -> http://www.openwall.com/lists/oss-security/2016/12/02/2
Comment 1 Prasad J Pandit 2016-12-02 01:38:15 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1400805]
Comment 3 Prasad J Pandit 2016-12-02 01:41:46 EST 
Statement:

This issue does not affect the versions of the kernel package as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
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