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Kernel Live Patch Security Notice LSN-0034-1

Kernel Live Patch Security Notice LSN-0034-1
Posted Jan 10, 2018
Authored by Benjamin M. Romer

On January 9, fixes for CVE-2017-5754 were released into the Ubuntu Xenial kernel version 4.4.0-108.131. This CVE, also known as "Meltdown," is a security vulnerability caused by flaws in the design of speculative execution hardware in the computer's CPU.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2017-5754
MD5 | 4974c888dabe678b81c7dea7955b3a4c

Kernel Live Patch Security Notice LSN-0034-1

Change Mirror Download
==========================================================================
Kernel Live Patch Security Notice LSN-0034-1
January 9, 2018

linux vulnerability
==========================================================================

A security issue affects these releases of Ubuntu:

| Series | Base kernel | Arch | flavors |
|------------------+--------------+----------+------------------|
| Ubuntu 16.04 LTS | 4.4.0 | amd64 | generic |
| Ubuntu 16.04 LTS | 4.4.0 | amd64 | lowlatency |
| Ubuntu 14.04 LTS | 4.4.0 | amd64 | generic |
| Ubuntu 14.04 LTS | 4.4.0 | amd64 | lowlatency |

Summary:

On January 9, fixes for CVE-2017-5754 were released into the Ubuntu Xenial
kernel version 4.4.0-108.131. This CVE, also known as "Meltdown," is a security
vulnerability caused by flaws in the design of speculative execution
hardware in the computer's CPU.

Details on the vulnerability and our response can be found here:
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SpectreAndMeltdown

Due to the high complexity of the fixes, we are unable to livepatch this
CVE. Please plan to reboot into kernel version 4.4.0-108.131 or newer as soon
as possible.

Software Description:
- linux: Linux kernel

Update instructions:

The problem can be corrected by installing an updated kernel with these
fixes and rebooting.

References:
CVE-2017-5754

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