oss-security - CVE request: Kernel: kvm: out of bounds memory access via vcpu

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Message-ID: <alpine.LFD.2.20.1612021209120.5066@wniryva>
Date: Fri, 2 Dec 2016 12:13:14 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE request: Kernel: kvm: out of bounds memory access via vcpu_id

   Hello,

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

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1400804

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

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