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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux Kernel routing_ioctl() Bug May Let Local Users Crash the System
SecurityTracker Alert ID:  1014944
SecurityTracker URL:  http://securitytracker.com/id/1014944
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Updated:  Sep 21 2005
Original Entry Date:  Sep 21 2005
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.6 prior to 2.6.13.2
Description:   A vulnerability was reported in the Linux Kernel. A local user can cause denial of service conditions.

A local user can issue a large number of fget() calls such that a reference counter will overrun and a subsequent fput() call will cause the wrong resources to be freed. As a result, the kernel may crash.

64-bit Symmetric Multi-Processor (SMP) systems may be affected.

Vasiliy Averin discovered this vulnerability.

The 32-bit tiocgdev ioctl() function on x86-64 systems contains the same type of vulnerability.

Impact:   A local user can cause the kernel to crash.
Solution:   The vendor has issued a fixed version (2.6.13.2), available at:

http://kernel.org/

Vendor URL:  www.kernel.org/ (Links to External Site)
Cause:   State error

Message History:   None.


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