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Date: Wed, 2 Mar 2011 08:57:27 -0500 (EST)
From: Petr Matousek <>
Subject: Re: CVE request: kernel: Multiple DoS issues in

----- Original Message -----
> Two requests for bugs in epoll:
> (1) The epoll subsystem in Linux did not prevent users from creating
> circular
> epoll file structures, potentially leading to a denial of service
> (kernel
> deadlock).
> Reference:
> Upstream commit:

Please use CVE-2011-1082.

> (2) The epoll subsystem allows users to create large nested epoll
> structures,
> which the kernel will then to walk with preemption disabled, causing a
> denial of
> service via excessive CPU consumption in the kernel.
> References:
> No upstream fix yet for this one.

Please use CVE-2011-1083.

Thank you,
Petr Matousek / Red Hat Security Response Team

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