USN-3484-1: Linux kernel vulnerability
21 November 2017
The system could be made to crash or run programs as an administrator.
- linux - Linux kernel
- linux-raspi2 - 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 package versions:
- linux-image-4.10.0-1021-raspi2 - 4.10.0-1021.24
- linux-image-4.10.0-40-generic - 4.10.0-40.44
- linux-image-4.10.0-40-generic-lpae - 4.10.0-40.44
- linux-image-4.10.0-40-lowlatency - 4.10.0-40.44
- linux-image-generic - 18.104.22.168.40
- linux-image-generic-lpae - 22.214.171.124.40
- linux-image-lowlatency - 126.96.36.199.40
- linux-image-raspi2 - 188.8.131.521.22
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.