From: Secunia Security Advisories (sec-advsecunia.com)
Date: Fri Jun 15 2007 - 10:02:05 CDT

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TITLE:
Linux Kernel "compat_sys_mount()" Denial of Service Security Issue

SECUNIA ADVISORY ID:
SA25682

VERIFY ADVISORY:
http://secunia.com/advisories/25682/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

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

DESCRIPTION:
A security issue has been reported in the Linux Kernel, which can be
exploited by malicious, local users to cause a DoS (Denial of
Service).

The security issue is caused due to a NULL pointer dereference error
in the "compat_sys_mount()" function in fs/compat.c, which can be
exploited to crash a vulnerable system by mounting an smbfs file
system in compatibility mode.

SOLUTION:
Update to version 2.6.21.1 or later.

PROVIDED AND/OR DISCOVERED BY:
OpenVZ Linux Kernel Team

ORIGINAL ADVISORY:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=822191a2fa1584a29c3224ab328507adcaeac1ab

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