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Secunia Network Software Inspector 2.0 (NSI) - Public Beta

The Public Beta has ended. Thanks to all that participated.

Learn more:
http://secunia.com/network_software_inspector_2/

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TITLE:
Linux Kernel "fcntl_setlk()" SMP Reordered Access Vulnerability

SECUNIA ADVISORY ID:
SA30101

VERIFY ADVISORY:
http://secunia.com/advisories/30101/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

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

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

The vulnerability is caused due to an error when preventing race
conditions between "fcntl_setlk()" and "close()" calls on SMP
systems. This can be exploited to trigger the improper, reordered
access to the file descriptor table and the "file_lock" structure of
an inode, between threads running on different CPUs.

The vulnerability is reported in versions prior to 2.6.25.2.

SOLUTION:
Update to version 2.6.25.2.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25.2

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About:
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