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Date: Fri, 11 Nov 2011 23:50:02 +0100
From: Petr Matousek <>
Subject: CVE Request -- kernel: jbd/jbd2: invalid value of first log block
 leads to oops

A flaw was found in the way Linux kernel's Journaling Block Device (JBD)
handled invalid log first block value. An attacker able to mount
malicious ext3 or ext4 image could use this flaw to crash the system.

Upstream commit:


Petr Matousek / Red Hat Security Response Team

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