TITLE:
Linux Kernel Program Control Return Denial of Service

SECUNIA ADVISORY ID:
SA19639

VERIFY ADVISORY:
http://secunia.com/advisories/19639/

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 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 the kernel returns
program control using SYSRET on Intel EM64T CPUs. The may cause a DoS
due to the way Intel EM64T CPUs handle uncanonical return addresses
when a user has been able to change the frames.

SOLUTION:
Update to version 2.6.16.5.

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

ORIGINAL ADVISORY:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.5

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