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TITLE:
Linux Kernel Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA33785

VERIFY ADVISORY:
http://secunia.com/advisories/33785/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

OPERATING SYSTEM:
Linux Kernel 2.6.x
http://secunia.com/advisories/product/2719/

DESCRIPTION:
Some vulnerabilities have been reported in the Linux Kernel, which
potentially can be exploited by malicious, local users to cause a DoS
(Denial of Service).

1) A vulnerability is caused due to an error within the
"make_indexed_dir()" function in fs/ext3/namei.c, which can be
exploited to e.g. crash a system via a specially crafted Ext3
system.

2) A vulnerability is caused due to an error within the
"inotify_read()" function in fs/notify/inotify/inotify_user.c, which
can result in the device's list mutex being unlocked twice. This can
be exploited to e.g. cause a system crash by passing an invalid
pointer to the "read()" function of an inotify instance while
simultaneously accessing it from different tasks.

The vulnerabilities are reported in versions prior to 2.6.27.14 and
2.6.28.3. Other versions may also be affected.

SOLUTION:
Update to version 2.6.27.14 and 2.6.28.3.

PROVIDED AND/OR DISCOVERED BY:
1) Sami Liedes 
2) Reported by the vendor.

ORIGINAL ADVISORY:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.14
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.3

1) http://bugzilla.kernel.org/show_bug.cgi?id=12430

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