USN-1606-1: Linux kernel vulnerabilities

11 October 2012

linux vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in the kernel.

Software Description

  • linux - Linux kernel

Details

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)

A flaw was found in how the Linux kernel passed the replacement session keyring to a child process. An unprivileged local user could exploit this flaw to cause a denial of service (panic). (CVE-2012-2745)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 10.04 LTS
linux-image-2.6.32-44-386 - 2.6.32-44.98
linux-image-2.6.32-44-generic - 2.6.32-44.98
linux-image-2.6.32-44-generic-pae - 2.6.32-44.98
linux-image-2.6.32-44-ia64 - 2.6.32-44.98
linux-image-2.6.32-44-lpia - 2.6.32-44.98
linux-image-2.6.32-44-powerpc - 2.6.32-44.98
linux-image-2.6.32-44-powerpc-smp - 2.6.32-44.98
linux-image-2.6.32-44-powerpc64-smp - 2.6.32-44.98
linux-image-2.6.32-44-preempt - 2.6.32-44.98
linux-image-2.6.32-44-server - 2.6.32-44.98
linux-image-2.6.32-44-sparc64 - 2.6.32-44.98
linux-image-2.6.32-44-sparc64-smp - 2.6.32-44.98
linux-image-2.6.32-44-versatile - 2.6.32-44.98
linux-image-2.6.32-44-virtual - 2.6.32-44.98

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well.

References