USN-4253-1: Linux kernel vulnerability
28 January 2020
linux, linux-aws vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.10
The Linux kernel could be made to expose sensitive information.
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
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.
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 - 126.96.36.1990.12
- linux-image-generic - 188.8.131.52.33
- linux-image-generic-lpae - 184.108.40.206.33
- linux-image-lowlatency - 220.127.116.11.33
- linux-image-virtual - 18.104.22.168.33
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.