1. Ubuntu Security Notices
  2. USN-6244-1

USN-6244-1: AMD Microcode vulnerability

Publication date

25 July 2023

Overview

AMD processors may allow an attacker to expose sensitive information due to a vector register speculative execution vulnerability.

Releases

Packages

Details

Tavis Ormandy discovered that some AMD processors did not properly handle
speculative execution of certain vector register instructions. A local attacker
could use this to expose sensitive information.

Tavis Ormandy discovered that some AMD processors did not properly handle
speculative execution of certain vector register instructions. A local 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
23.04 lunar amd64-microcode –  3.20220411.1ubuntu3.1
22.04 jammy amd64-microcode –  3.20191218.1ubuntu2.1
20.04 focal amd64-microcode –  3.20191218.1ubuntu1.1
18.04 bionic amd64-microcode –  3.20191021.1+really3.20181128.1~ubuntu0.18.04.1+esm1  
16.04 xenial amd64-microcode –  3.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm1  

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References

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