Ubuntu Security Notice USN-3484-1
20th November, 2017
linux, linux-raspi2 vulnerability
A security issue affects these releases of Ubuntu and its
- Ubuntu 17.04
The system could be made to crash or run programs as an administrator.
– Linux kernel
– Linux kernel for Raspberry Pi 2
It was discovered that the KVM subsystem in the Linux kernel did not
properly keep track of nested levels in guest page tables. A local attacker
in a guest VM could use this to cause a denial of service (host OS crash)
or possibly execute arbitrary code in the host OS.
The problem can be corrected by updating your system to the following
- Ubuntu 17.04:
- linux-image-generic 220.127.116.11.40
- linux-image-generic-lpae 18.104.22.168.40
- linux-image-lowlatency 22.214.171.124.40
- linux-image-raspi2 126.96.36.1991.22
To update your system, please follow these instructions:
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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.