============================================================================ Ubuntu Security Notice USN-1607-1 October 11, 2012 linux vulnerabilities ============================================================================ A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 11.10 Summary: Several security issues were fixed in the kernel. Software Description: - linux: Linux kernel Details: Vadim Ponomarev discovered a flaw in the Linux kernel causing a reference leak when PID namespaces are used. A remote attacker could exploit this flaw causing a denial of service. (CVE-2012-2127) A flaw was found in how the Linux kernel's KVM (Kernel-based Virtual Machine) subsystem handled MSI (Message Signaled Interrupts). A local unprivileged user could exploit this flaw to cause a denial of service or potentially elevate privileges. (CVE-2012-2137) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 11.10: linux-image-3.0.0-26-generic 3.0.0-26.43 linux-image-3.0.0-26-generic-pae 3.0.0-26.43 linux-image-3.0.0-26-omap 3.0.0-26.43 linux-image-3.0.0-26-powerpc 3.0.0-26.43 linux-image-3.0.0-26-powerpc-smp 3.0.0-26.43 linux-image-3.0.0-26-powerpc64-smp 3.0.0-26.43 linux-image-3.0.0-26-server 3.0.0-26.43 linux-image-3.0.0-26-virtual 3.0.0-26.43 After a standard system update you need to reboot your computer to make all the necessary changes. References: http://www.ubuntu.com/usn/usn-1607-1 CVE-2012-2127, CVE-2012-2137 Package Information: https://launchpad.net/ubuntu/+source/linux/3.0.0-26.43