oss-security - CVE request Virglrenderer: host memory leakage when creating decode context

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Date: Tue, 24 Jan 2017 12:58:08 +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 request Virglrenderer: host memory leakage when creating decode
 context

   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 decode context via 'VIRTIO_GPU_CMD_CTX_CREATE' 
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=747a293ff6055203e529f083896b823e22523fe7

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1415944

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

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

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