USN-8475-1: AMD Microcode vulnerabilities
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)
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/amd64-microcodeto a version that resolves this vulnerability.Fixed in 3.20251202.1ubuntu0.25.10.1 - Upgrade
Upgrade
ubuntu/amd64-microcodeto a version that resolves this vulnerability.Fixed in 3.20251202.1ubuntu0.24.04.1
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
Who is exposed to these issues?
Systems using affected AMD processors are exposed. Exploitation requires a local attacker; the RDSEED entropy issue specifically affects some AMD Zen 5 processors that support the RDSEED instruction.
What could an attacker achieve?
For CVE-2024-36350 and CVE-2024-36357, a local attacker may infer data from previous stores and expose privileged sensitive information. For CVE-2025-62626, a local attacker may influence RDSEED-returned values, potentially affecting confidentiality and integrity.