Ubuntu USN · USN-8475-1

AMD Microcode vulnerabilities

Published: Thu, 25 Jun 2026 15:09

CVE-2024-36357CVE-2024-36350CVE-2025-62626

Summary

Several security issues were fixed in AMD Microcode.

Details

Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos, and Flavien Solt discovered that some AMD processors may allow an attacker to infer data from previous stores, potentially resulting in the leakage of privileged information. A local attacker could possibly use this to expose sensitive information. (CVE-2024-36350, CVE-2024-36357) It was discovered that some AMD Zen 5 processors supporting RDSEED instruction did not properly handle entropy, potentially resulting in the consumption of insufficiently random values. A local attacker could possibly use this issue to influence the values returned by the RDSEED instruction causing loss of confidentiality and integrity. (CVE-2025-62626)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu noble

amd64-microcode→3.20251202.1ubuntu0.24.04.1apt_upgrade
Standard apt upgrade. Install 3.20251202.1ubuntu0.24.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y amd64-microcode
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
amd64-microcode→3.20251202.1ubuntu0.24.04.1apt_upgrade
Standard apt upgrade. Install 3.20251202.1ubuntu0.24.04.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y amd64-microcode
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

amd64-microcode→3.20251202.1ubuntu0.25.10.1apt_upgrade
Standard apt upgrade. Install 3.20251202.1ubuntu0.25.10.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y amd64-microcode
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
amd64-microcode→3.20251202.1ubuntu0.25.10.1apt_upgrade
Standard apt upgrade. Install 3.20251202.1ubuntu0.25.10.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y amd64-microcode
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Are YOU affected by USN-8475-1?

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