USN-2585-1: Linux kernel vulnerability

Releases

• Ubuntu 12.04

Packages

• linux - Linux kernel

Details

It was discovered that the Linux kernel's IPv6 networking stack has a flaw
that allows using route advertisement (RA) messages to set the 'hop_limit'
to values that are too low. An unprivileged attacker on a local network
could exploit this flaw to cause a denial of service (IPv6 messages
dropped).

Update instructions

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

Ubuntu 12.04

• linux-image-3.2.0-82-generic - 3.2.0-82.119
• linux-image-3.2.0-82-virtual - 3.2.0-82.119
• linux-image-3.2.0-82-generic-pae - 3.2.0-82.119
• linux-image-3.2.0-82-powerpc-smp - 3.2.0-82.119
• linux-image-3.2.0-82-powerpc64-smp - 3.2.0-82.119
• linux-image-3.2.0-82-omap - 3.2.0-82.119
• linux-image-3.2.0-82-highbank - 3.2.0-82.119

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

• CVE-2015-2922

Related notices

• USN-2586-1: linux-ti-omap4, linux-image-3.2.0-1463-omap4
• USN-2587-1: linux-lts-trusty, linux-image-3.13.0-51-generic-lpae, linux-image-3.13.0-51-generic
• USN-2590-1: linux-image-3.16.0-36-generic-lpae, linux-image-3.16.0-36-powerpc-e500mc, linux, linux-image-3.16.0-36-powerpc64-emb, linux-image-3.16.0-36-generic, linux-image-3.16.0-36-lowlatency, linux-image-3.16.0-36-powerpc-smp, linux-image-3.16.0-36-powerpc64-smp
• USN-2588-1: linux-image-3.13.0-51-generic-lpae, linux-image-3.13.0-51-powerpc64-emb, linux, linux-image-3.13.0-51-lowlatency, linux-image-3.13.0-51-powerpc-e500mc, linux-image-3.13.0-51-powerpc-e500, linux-image-3.13.0-51-generic, linux-image-3.13.0-51-powerpc64-smp, linux-image-3.13.0-51-powerpc-smp, linux-image-extra-3.13.0-51-generic
• USN-2589-1: linux-image-3.16.0-36-generic-lpae, linux-image-3.16.0-36-powerpc-e500mc, linux-lts-utopic, linux-image-3.16.0-36-powerpc64-emb, linux-image-extra-3.16.0-36-generic, linux-image-3.16.0-36-generic, linux-image-3.16.0-36-lowlatency, linux-image-3.16.0-36-powerpc-smp, linux-image-3.16.0-36-powerpc64-smp