USN-4253-1: Linux kernel vulnerability
linux, linux-aws vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.10
Summary
The Linux kernel could be made to expose sensitive information.
Software Description
- linux – Linux kernel
- linux-aws – Linux kernel for Amazon Web Services (AWS) systems
Details
It was discovered that the Linux kernel did not properly clear data
structures on context switches for certain Intel graphics processors. A
local attacker could use this to expose sensitive information.
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 19.10
- linux-image-5.3.0-1010-aws – 5.3.0-1010.11
- linux-image-5.3.0-29-generic – 5.3.0-29.31
- linux-image-5.3.0-29-generic-lpae – 5.3.0-29.31
- linux-image-5.3.0-29-lowlatency – 5.3.0-29.31
- linux-image-5.3.0-29-snapdragon – 5.3.0-29.31
- linux-image-aws – 5.3.0.1010.12
- linux-image-generic – 5.3.0.29.33
- linux-image-generic-lpae – 5.3.0.29.33
- linux-image-lowlatency – 5.3.0.29.33
- linux-image-virtual – 5.3.0.29.33
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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
Source: USN-4253-1: Linux kernel vulnerability
