kernel is vulnerable to denial of service. A flaw was found in the Linux kernel’s Journaling Block Device (JBD). A local attacker could use this flaw to crash the system by mounting a specially-crafted ext3 or ext4 disk.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=8762202dd0d6e46854f786bdb6fb3780a1625efe
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8762202dd0d6e46854f786bdb6fb3780a1625efe
lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
secunia.com/advisories/48898
securitytracker.com/id?1026325
www.openwall.com/lists/oss-security/2011/11/11/6
www.openwall.com/lists/oss-security/2011/11/13/4
www.securityfocus.com/bid/50663
xorl.wordpress.com/2011/12/08/cve-2011-4132-linux-kernel-jbdjbd2-local-dos/
access.redhat.com/errata/RHSA-2012:0007
access.redhat.com/security/updates/classification/#important
bugzilla.redhat.com/show_bug.cgi?id=753341
docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.7_Technical_Notes/kernel.html#RHSA-2012-0007
rhn.redhat.com/errata/RHSA-2011-1212.html