USN-5039-1: Linux kernel vulnerability
12 August 2021
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-kvm - Linux kernel for cloud environments
- linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
Details
Andy Nguyen discovered that the netfilter subsystem in the Linux kernel
contained an out-of-bounds write in its setsockopt() implementation. A
local 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 16.04
-
linux-image-4.4.0-1096-kvm
-
4.4.0-1096.105
Available with Ubuntu Pro
-
linux-image-4.4.0-1131-aws
-
4.4.0-1131.145
Available with Ubuntu Pro
-
linux-image-4.4.0-213-generic
-
4.4.0-213.245
Available with Ubuntu Pro
-
linux-image-4.4.0-213-lowlatency
-
4.4.0-213.245
Available with Ubuntu Pro
-
linux-image-aws
-
4.4.0.1131.136
Available with Ubuntu Pro
-
linux-image-generic
-
4.4.0.213.220
Available with Ubuntu Pro
-
linux-image-kvm
-
4.4.0.1096.94
Available with Ubuntu Pro
-
linux-image-lowlatency
-
4.4.0.213.220
Available with Ubuntu Pro
-
linux-image-virtual
-
4.4.0.213.220
Available with Ubuntu Pro
Ubuntu 14.04
-
linux-image-3.13.0-187-generic
-
3.13.0-187.238
Available with Ubuntu Pro
-
linux-image-3.13.0-187-generic-lpae
-
3.13.0-187.238
Available with Ubuntu Pro
-
linux-image-3.13.0-187-lowlatency
-
3.13.0-187.238
Available with Ubuntu Pro
-
linux-image-4.4.0-1095-aws
-
4.4.0-1095.100
Available with Ubuntu Pro
-
linux-image-4.4.0-213-generic
-
4.4.0-213.245~14.04.1
Available with Ubuntu Pro
-
linux-image-4.4.0-213-lowlatency
-
4.4.0-213.245~14.04.1
Available with Ubuntu Pro
-
linux-image-aws
-
4.4.0.1095.93
Available with Ubuntu Pro
-
linux-image-generic
-
3.13.0.187.196
Available with Ubuntu Pro
-
linux-image-generic-lpae
-
3.13.0.187.196
Available with Ubuntu Pro
-
linux-image-generic-lts-xenial
-
4.4.0.213.186
Available with Ubuntu Pro
-
linux-image-lowlatency
-
3.13.0.187.196
Available with Ubuntu Pro
-
linux-image-lowlatency-lts-xenial
-
4.4.0.213.186
Available with Ubuntu Pro
-
linux-image-server
-
3.13.0.187.196
Available with Ubuntu Pro
-
linux-image-virtual
-
3.13.0.187.196
Available with Ubuntu Pro
-
linux-image-virtual-lts-xenial
-
4.4.0.213.186
Available with Ubuntu Pro
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.
References
Related notices
- LSN-0080-1: gkeop-5.4, generic-4.4, gke, lowlatency-5.4, gkeop, oem, gke-4.15, lowlatency-4.15, gcp, gke-5.4, lowlatency-4.4, generic-5.4, generic-4.15
- LSN-0081-1: gkeop-5.4, generic-4.4, gke, lowlatency-5.4, gkeop, oem, gke-4.15, lowlatency-4.15, gcp, gke-5.4, lowlatency-4.4, generic-5.4, generic-4.15
- LSN-0083-1: gkeop-5.4, generic-4.4, gke, lowlatency-5.4, gkeop, oem, gke-4.15, lowlatency-4.15, gcp, azure, gke-5.4, lowlatency-4.4, aws, generic-5.4, generic-4.15