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Date: Wed, 04 Dec 2013 08:46:39 -0600
From: Jamie Strandboge <>
CC: Kurt Seifried <>, security <>, 
Subject: Re: CVE Request: xorg-server and pixman

On 12/04/2013 01:09 AM, Murray McAllister wrote:
> On 12/04/2013 03:32 PM, Kurt Seifried wrote:
>> On 12/03/2013 10:54 AM, Jamie Strandboge wrote:
>>> Hi,
>>> This bug has been public since August but I could find a CVE for
>>> it:
>>> There are two bugs - Xorg can be made to crash and pixman can
>>> trigger the aformentioned Xorg crash. A simplified reproducer is in
>>> the pixman patches with another reproducer in the Launchpad bug.
>>> The xorg
>>> xorg-server - exa: only draw valid trapezoids The patch was
>>> submitted in October but doesn't seem to be applied yet, so I'm 
>>> CC'ing xorg_security. Patch references the pixman f.d.o bug, but
>>> doesn't seem to have an associated xorg bug. 
>>> Pixman - Corrupted CustomShape crashes Xorg 
>>> Patch: -
>>> 5e14da97f16e421d084a9e735be21b1025150f0c (fix) -
>>> 2f876cf86718d3dd9b3b04ae9552530edafe58a1 (test case)
>>> Thanks!
>> So only crashes, you can trigger it via, or via pixman? or
>> is pixman also crashing?
> From and
> it sounded like it would
> affect both 1) crash an application using pixman 2) crash the X server
> Is that correct?

AIUI, this is correct. See:

"No, it really is a bug in pixman too. I just fixed the same comparison that
happens in xorg-server, but pixman is still affected."

Jamie Strandboge       

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