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Date: Wed, 14 Jun 2017 09:24:26 +1200
From: Murray McAllister <>
Subject: Re: Linux kernel: drm/vmwgfx: 4 byte read of uninitialised kernel
 memory in vmw_gb_surface_define_ioctl()

On 13/06/17 15:39, Murray McAllister wrote:
> The vmw_gb_surface_define_ioctl() function (accessible via
> DRM_IOCTL_VMW_GB_SURFACE_CREATE) defines a backup_handle variable but
> does not give it an initial value. If you attempt to create a GB
> surface, and provide a previously-allocated DMA buffer to be used as a
> backup buffer, the backup_handle variable does not get written to and is
> then later returned to user-space.
> Upstream commit:
> CVE:
> I'll request one now and reply once I have one.

MITRE assigned CVE-2017-9605.


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