USN-4303-2: Linux kernel (HWE) vulnerability
Publication date
17 March 2020
Overview
The system could be made to expose sensitive information.
Releases
Packages
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-lts-xenial - Linux hardware enablement kernel from Xenial for Trusty
Details
USN-4303-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 ESM.
Paulo Bonzini discovered that the KVM hypervisor implementation in the
Linux kernel could improperly let a nested (level 2) guest access the
resources of a parent (level 1) guest in certain situations. An attacker
could use this to expose sensitive information.
USN-4303-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 ESM.
Paulo Bonzini discovered that the KVM hypervisor implementation in the
Linux kernel could improperly let a nested (level 2) guest access the
resources of a parent (level 1) guest in certain situations. An attacker
could use this to expose sensitive information.
Update instructions
After a standard system update you need to reboot your computer to make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
Ubuntu Release | Package Version | ||
---|---|---|---|
14.04 trusty | linux-image-powerpc-smp-lts-xenial – 4.4.0.176.155 | ||
linux-image-4.4.0-1064-aws – 4.4.0-1064.68 | |||
linux-image-virtual-lts-xenial – 4.4.0.176.155 | |||
linux-image-4.4.0-176-powerpc64-smp – 4.4.0-176.206~14.04.1 | |||
linux-image-4.4.0-176-generic – 4.4.0-176.206~14.04.1 | |||
linux-image-generic-lpae-lts-xenial – 4.4.0.176.155 | |||
linux-image-4.4.0-176-powerpc64-emb – 4.4.0-176.206~14.04.1 | |||
linux-image-4.4.0-176-powerpc-smp – 4.4.0-176.206~14.04.1 | |||
linux-image-lowlatency-lts-xenial – 4.4.0.176.155 | |||
linux-image-powerpc64-smp-lts-xenial – 4.4.0.176.155 | |||
linux-image-powerpc64-emb-lts-xenial – 4.4.0.176.155 | |||
linux-image-4.4.0-176-lowlatency – 4.4.0-176.206~14.04.1 | |||
linux-image-generic-lts-xenial – 4.4.0.176.155 | |||
linux-image-aws – 4.4.0.1064.65 | |||
linux-image-powerpc-e500mc-lts-xenial – 4.4.0.176.155 | |||
linux-image-4.4.0-176-powerpc-e500mc – 4.4.0-176.206~14.04.1 | |||
linux-image-4.4.0-176-generic-lpae – 4.4.0-176.206~14.04.1 |
Reduce your security exposure
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Related notices
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