oss-security - CVE-2017-1000407 Kernel: KVM: DoS via write flood to I/O port 0x80

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Message-ID: <nycvar.YSQ.7.76.1712041645550.20983@wniryva>
Date: Mon, 4 Dec 2017 16:47:06 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE-2017-1000407 Kernel: KVM: DoS via write flood to I/O port 0x80

   Hello,

Linux kernel built with the KVM virtualization(CONFIG_KVM) support for the 
Intel processor family(CONFIG_KVM_INTEL), is vulnerable to a DoS issue. It 
could occur if a guest was to flood the I/O port 0x80 with write requests.

A guest user could use this flaw to crash the host kernel resulting in DoS.

Upstream patch
--------------
   -> https://www.spinics.net/lists/kvm/msg159809.html

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

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