Description
Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious CPU microcode resulting in loss of confidentiality and integrity of a confidential guest running under AMD SEV-SNP.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| AMD | AMD EPYC™ 7001 Series | — | NaplesPI 1.0.0.P |
| AMD | AMD EPYC™ 7002 Series | — | RomePI 1.0.0.L |
| AMD | AMD EPYC™ 7003 Series | — | MilanPI 1.0.0.F |
| AMD | AMD EPYC™ 9004 Series | — | Genoa 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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | amd64-microcode | 3.20250311.1 | — |
| Debian 13 | amd64-microcode | 3.20250311.1 | — |
| Debian 12 | amd64-microcode | 3.20250311.1~deb12u1 | — |
| Debian 11 | amd64-microcode | 3.20250311.1~deb11u1 | DLA-4098-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.04 | amd64-microcode | 3.20250311.1ubuntu0.25.04.1 | USN-7560-1 |
| Ubuntu 24.04 LTS | amd64-microcode | 3.20250311.1ubuntu0.24.04.1 | USN-7561-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | spectre-meltdown-checker | 26.36.0602723-1.1 | openSUSE-SU-2026:11242-1 |
Advisories 5
- openSUSE-SU-2026:11242-1 spectre-meltdown-checker-26.36.0602723-1.1 on GA media SUSE / openSUSE Security Updates · Jul 10, 2026
- WID-SEC-2025-0257 AMD Prozessor: Schwachstelle ermöglicht das Umgehen von Sicherheitsmaßnahmen BSI CERT-Bund (WID) · Mar 29, 2026
- DLA-4098-1 amd64-microcode - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-7561-1 amd64-microcode vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-7560-1 amd64-microcode vulnerability Ubuntu Security Notices (USN) · Feb 4, 2026