========================================================================== Ubuntu Security Notice USN-1406-1 March 27, 2012
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in the kernel.
Software Description: - linux: Linux kernel
Sasha Levin discovered a flaw in the permission checking for device assignments requested via the kvm ioctl in the Linux kernel. A local user could use this flaw to crash the system causing a denial of service. (CVE-2011-4347)
Stephan BA¤rwolf discovered a flaw in the KVM (kernel-based virtual machine) subsystem of the Linux kernel. A local unprivileged user can crash use this flaw to crash VMs causing a deny of service. (CVE-2012-0045)
H. Peter Anvin reported a flaw in the Linux kernel that could crash the system. A local user could exploit this flaw to crash the system. (CVE-2012-1097)
A flaw was discovered in the Linux kernel's cgroups subset. A local attacker could use this flaw to crash the system. (CVE-2012-1146)
The problem can be corrected by updating your system to the following package versions:
Ubuntu 11.04: linux-image-2.6.38-13-generic 2.6.38-13.57 linux-image-2.6.38-13-generic-pae 2.6.38-13.57 linux-image-2.6.38-13-omap 2.6.38-13.57 linux-image-2.6.38-13-powerpc 2.6.38-13.57 linux-image-2.6.38-13-powerpc-smp 2.6.38-13.57 linux-image-2.6.38-13-powerpc64-smp 2.6.38-13.57 linux-image-2.6.38-13-server 2.6.38-13.57 linux-image-2.6.38-13-versatile 2.6.38-13.57 linux-image-2.6.38-13-virtual 2.6.38-13.57
After a standard system update you need to reboot your computer to make all the necessary changes.
References: http://www.ubuntu.com/usn/usn-1406-1 CVE-2011-4347, CVE-2012-0045, CVE-2012-1097, CVE-2012-1146
Package Information: https://launchpad.net/ubuntu/+source/linux/2.6.38-13.57