oss-security - CVE-2017-17741 kernel: kvm: stack-based out-of-bounds read via vmcall instruction

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Message-ID: <nycvar.YSQ.7.76.1712191414120.29121@wniryva>
Date: Tue, 19 Dec 2017 14:15:43 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: CVE-2017-17741 kernel: kvm: stack-based out-of-bounds read via vmcall
 instruction

   Hello,

Linux kernel built with the KVM virtualization(CONFIG_KVM) support is 
vulnerable to an out-of-bounds read access issue. It could occur when 
emulating vmcall instruction invoked by a guest.

A guest user/process could use this flaw to disclose kernel memory bytes.

Upstream patch:
---------------
   -> https://www.spinics.net/lists/kvm/msg160796.html

CVE assigned via https://cveform.mitre.org/

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

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