USN-7535-1: Intel Microcode vulnerabilities

Publication date

27 May 2025

Overview

Several security issues were fixed in Intel Microcode.


Packages

Details

Sander Wiebing and Cristiano Giuffrida discovered that some Intel®
Processors did not properly handle data in Shared Microarchitectural
Structures during Transient Execution. An authenticated attacker could
possibly use this issue to obtain sensitive information. (CVE-2024-28956)

It was discovered that some Intel® Processors did not properly handle
prediction calculations. An authenticated attacker could possibly use this
issue to obtain sensitive information. (CVE-2024-43420, CVE-2024-45332,
CVE-2025-20623)

It was discovered that some Intel® Processors did not properly initialize
resources in the branch prediction unit. An authenticated attacker could
possibly use this issue to obtain sensitive information. (CVE-2025-20012,

Sander Wiebing and Cristiano Giuffrida discovered that some Intel®
Processors did not properly handle data in Shared Microarchitectural
Structures during Transient Execution. An authenticated attacker could
possibly use this issue to obtain sensitive information. (CVE-2024-28956)

It was discovered that some Intel® Processors did not properly handle
prediction calculations. An authenticated attacker could possibly use this
issue to obtain sensitive information. (CVE-2024-43420, CVE-2024-45332,
CVE-2025-20623)

It was discovered that some Intel® Processors did not properly initialize
resources in the branch prediction unit. An authenticated attacker could
possibly use this issue to obtain sensitive information. (CVE-2025-20012,
CVE-2025-24495)

Michal Raviv and Jeff Gilbert discovered that some Intel® Processors did
not properly handle resources and exceptions in the core management
mechanism. An authenticated attacker could possibly use this issue to
cause a denial of service. (CVE-2025-20054, CVE-2025-20103)


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
25.04 plucky intel-microcode –  3.20250512.0ubuntu0.25.04.1
24.10 oracular intel-microcode –  3.20250512.0ubuntu0.24.10.1
24.04 noble intel-microcode –  3.20250512.0ubuntu0.24.04.1
22.04 jammy intel-microcode –  3.20250512.0ubuntu0.22.04.1
20.04 focal intel-microcode –  3.20250512.0ubuntu0.20.04.1
18.04 bionic intel-microcode –  3.20250512.0ubuntu0.18.04.1+esm1  
16.04 xenial intel-microcode –  3.20250512.0ubuntu0.16.04.1+esm1  

Reduce your security exposure

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