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Date: Tue, 12 Apr 2011 11:36:21 +0200
From: Timo Warns <>
CC: Eugene Teo <>, Josh Bressers <>
Subject: Re: CVE request: kernel: fs/partitions: Kernel heap
 overflow via corrupted LDM partition tables

Am 24.02.2011 02:25, schrieb Eugene Teo:
> On 02/24/2011 03:59 AM, Josh Bressers wrote:
>> ----- Original Message -----
>>> The kernel automatically evaluates partition tables of storage devices.
>>> The code for evaluating LDM partitions (in fs/partitions/ldm.c) contains
>>> a bug that allows to overflow the kernel heap. It may be possible to
>>> escalate privileges by exploiting this bug.
>>> (This bug is distinct from the LDM bug reported by Eugene Teo on
>>> 2011-02-23.)
>>> This should affect both, 2.4 and 2.6 kernel. As a prerequisite,
>>> CONFIG_LDM_PARTITION needs to be set.
>> Can you point to a commit message or something else that is public? It's
>> not clear how this differs from Eugene's request.
> As far as I can tell, it's not public yet. Timo will follow-up once his
> patch is accepted.

A patch is now available at

Best regards, Timo

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