Description
Use of a per-part static key in the ASP Bootloader could allow an attacker to downgrade the Secure Encrypted Virtualization (SEV) firmware and exploit known vulnerabilities to decrypt memory potentially resulting in loss of confidentiality.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| AMD | AMD EPYC™ 9004 Series Processors | — | GenoaPI_1.0.0.J |
| AMD | AMD EPYC™ 7003 Series Processors | — | MilanPI-SP3_1.0.0.K |
| AMD | AMD EPYC™ 8004 Series Processors | — | GenoaPI_1.0.0.J |
| AMD | AMD EPYC™ Embedded 7003 Series Processors | — | EmbMilanPI-SP3 1.0.0.E |
| AMD | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa") | — | EmbeddedGenoaPI_1.0.0.E |
| AMD | AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Bergamo") | — | EmbeddedGenoaPI_1.0.0.E |
| AMD | AMD EPYC™ Embedded 8004 Series Processors | — | EmbeddedGenoaPI_1.0.0.E |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | amd64-microcode | No fix yet | — |
| Ubuntu 26.04 LTS | amd64-microcode | No fix yet | — |
| Ubuntu 24.04 LTS | amd64-microcode | No fix yet | — |
Advisories 1
- WID-SEC-2026-4471 AMD Prozessor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026