oss-security - CVE-2017-6386 Virglrenderer: memory leakage while in vrend_create_vertex_elements

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Message-ID: <alpine.LFD.2.20.1703011206260.1553@wniryva>
Date: Wed, 1 Mar 2017 12:08:16 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Li Qiang <liqiang6-s@....cn>
Subject: CVE-2017-6386 Virglrenderer: memory leakage while in
 vrend_create_vertex_elements_state

   Hello,

Virgil 3d project, used by Quick Emulator(Qemu) to implement 3D GPU support 
for the virtio GPU, is vulnerable to memory leakage issue. It could occur when 
a guest tries to create vertex elements via 'VIRGL_OBJECT_VERTEX_ELEMENTS' 
command.

A guest user/process could use this flaw to leak host memory resulting in DoS.

Upstream patch:
---------------
   -> https://cgit.freedesktop.org/virglrenderer/commit/?id=737c3350850ca4dbc5633b3bdb4118176ce59920

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1427472

This issue was reported by Li Qiang of 360.cn Inc.

'CVE-2017-6386' assigned via -> http://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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