Ubuntu Update for acpid USN-1296-1

Ubuntu Update for Linux kernel vulnerabilities USN-1296-1
Please Install the Updated Packages.
Oliver-Tobias Ripka discovered that an ACPI script incorrectly handled power button events. A local attacker could use this to execute arbitrary code, and possibly escalate privileges. (CVE-2011-2777) Helmut Grohne and Michael Biebl discovered that ACPI scripts were executed with a permissive file mode creation mask (umask). A local attacker could read files and modify directories created by ACPI scripts that did not set a strict umask. (CVE-2011-4578)
acpid on Ubuntu 11.04 , Ubuntu 10.10 , Ubuntu 10.04 LTS