USN-3819-1: Linux kernel vulnerability
14 November 2018
The system could be made to crash or run programs as an administrator.
Releases
Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm - Linux kernel for cloud environments
- linux-raspi2 - Linux kernel for Raspberry Pi 2
Details
Felix Wilhelm discovered that the Xen netback driver in the Linux kernel
did not properly perform input validation in some situations. An attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.10
-
linux-image-4.18.0-11-generic-lpae
-
4.18.0-11.12
-
linux-image-gke
-
4.18.0.1003.3
-
linux-image-4.18.0-1003-gcp
-
4.18.0-1003.4
-
linux-image-4.18.0-1004-aws
-
4.18.0-1004.5
-
linux-image-4.18.0-1004-kvm
-
4.18.0-1004.4
-
linux-image-generic-lpae
-
4.18.0.11.12
-
linux-image-4.18.0-1006-raspi2
-
4.18.0-1006.8
-
linux-image-4.18.0-11-lowlatency
-
4.18.0-11.12
-
linux-image-4.18.0-11-generic
-
4.18.0-11.12
-
linux-image-generic
-
4.18.0.11.12
-
linux-image-snapdragon
-
4.18.0.11.12
-
linux-image-aws
-
4.18.0.1004.4
-
linux-image-kvm
-
4.18.0.1004.4
-
linux-image-gcp
-
4.18.0.1003.3
-
linux-image-lowlatency
-
4.18.0.11.12
-
linux-image-raspi2
-
4.18.0.1006.3
-
linux-image-4.18.0-11-snapdragon
-
4.18.0-11.12
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.