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Date: Wed, 31 Oct 2012 15:31:20 +0100
From: Petr Matousek <>
Subject: CVE Request -- kernel: net: divide by zero in tcp algorithm illinois

Description of the problem:
Reading TCP stats when using TCP Illinois congestion control algorithm
can cause a divide by zero kernel oops.

An unprivileged local user could use this flaw to crash the system.

Proposed upstream patch:


This issue was discovered by Rodrigo Freire of Red Hat.


Petr Matousek / Red Hat Security Response Team

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