kernel: thinkpad-acpi: lock down video output state access

drivers/platform/x86/thinkpadacpi.c in the Linux kernel before 2.6.34 on ThinkPad devices, when the X.Org X server is used, does not properly restrict access to the video output control state, which allows local users to cause a denial of service system hang via a 1 read or 2 write operation...

PT-2011-1404 · X.Org +2 · X.Org Server +2

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 2.6.34 Description: The issue allows local users to cause a denial of service, resulting in a system hang, by performing a read or write operation on the video output control state. This is due to the lack of...