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USN-2036-1: Linux kernel vulnerabilities

3 December 2013

Several security issues were fixed in the kernel.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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A flaw was discovered in the Linux kernel's KVM (kernel virtual machine).
An administrative user in the guest OS could leverage this flaw to cause a
denial of service in the host OS. (CVE-2012-2121)

Multiple integer overflow flaws were discovered in the Alchemy LCD frame-
buffer drivers in the Linux kernel. An unprivileged local user could
exploit this flaw to gain administrative privileges. (CVE-2013-4511)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 10.04

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.

Related notices

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  • USN-1470-1: linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-server, linux-lts-backport-natty, linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-generic
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