Red Hat Security Advisory 2012-1445-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the RHSA-2010:0178 update did not correctly fix the CVE-2009-4307 issue, a divide-by-zero flaw in the ext4 file system code. A local, unprivileged user with the ability to mount an ext4 file system could use this flaw to cause a denial of service. This update also fixes several bugs.
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