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Linux Kernel "fcntl_setlk()" SMP Reordered Access Vulnerability
Secunia Advisory: SA30101
Release Date: 2008-05-07
Popularity: 5,994 views

Critical:
Not critical
Impact: DoS
Where: Local system
Solution Status: Vendor Patch

OS:Linux Kernel 2.6.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

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.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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