Advisory Published

USN-6286-1: Intel Microcode vulnerabilities

First published: Mon Aug 14 2023(Updated: )

Daniel Moghimi discovered that some Intel(R) Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information. (CVE-2022-40982) It was discovered that some Intel(R) Xeon(R) Processors did not properly restrict error injection for Intel(R) SGX or Intel(R) TDX. A local privileged user could use this to further escalate their privileges. (CVE-2022-41804) It was discovered that some 3rd Generation Intel(R) Xeon(R) Scalable processors did not properly restrict access in some situations. A local privileged attacker could use this to obtain sensitive information. (CVE-2023-23908)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/intel-microcode<3.20230808.0ubuntu1
3.20230808.0ubuntu1
=23.04
All of
ubuntu/intel-microcode<3.20230808.0ubuntu0.22.04.1
3.20230808.0ubuntu0.22.04.1
=22.04
All of
ubuntu/intel-microcode<3.20230808.0ubuntu0.20.04.1
3.20230808.0ubuntu0.20.04.1
=20.04
All of
ubuntu/intel-microcode<3.20230808.0ubuntu0.18.04.1+esm1
3.20230808.0ubuntu0.18.04.1+esm1
=18.04
All of
ubuntu/intel-microcode<3.20230808.0ubuntu0.16.04.1+esm1
3.20230808.0ubuntu0.16.04.1+esm1
=16.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for USN-6286-1?

    The vulnerability ID for USN-6286-1 is CVE-2022-40982.

  • How does the vulnerability in Intel Microcode affect the system?

    The vulnerability in Intel Microcode allows a local unprivileged user to obtain sensitive information.

  • Which versions of Ubuntu are affected by the Intel Microcode vulnerabilities?

    The versions of Ubuntu affected are 23.04, 22.04, 20.04, 18.04, and 16.04.

  • What is the remedy for the vulnerability in Intel Microcode?

    The remedy for the vulnerability is to update the intel-microcode package to version 3.20230808.0ubuntu1 for Ubuntu 23.04, version 3.20230808.0ubuntu0.22.04.1 for Ubuntu 22.04, version 3.20230808.0ubuntu0.20.04.1 for Ubuntu 20.04, version 3.20230808.0ubuntu0.18.04.1+esm1 for Ubuntu 18.04, and version 3.20230808.0ubuntu0.16.04.1+esm1 for Ubuntu 16.04.

  • Where can I find more information about the Intel Microcode vulnerabilities?

    You can find more information about the Intel Microcode vulnerabilities on the Ubuntu security advisory pages for CVE-2022-40982, CVE-2023-23908, and CVE-2022-41804.

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