CVE-2025-0033
Publication date 14 October 2025
Last updated 12 December 2025
Ubuntu priority
Description
Improper access control within AMD SEV-SNP could allow an admin privileged attacker to write to the RMP during SNP initialization, potentially resulting in a loss of SEV-SNP guest memory integrity.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| amd64-microcode | 25.10 questing |
Needs evaluation
|
| 25.04 plucky |
Needs evaluation
|
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty | Ignored no real-world users |
Notes
rodrigo-zaiden
AMD SB mentions fix in both SEV (amd/) and ucode (amd-ucode/) binaries. didn't find matches in upstream for SEV binaries but ucode versions found in upstream version: 2025-07-29 This is not planned to be fixed for the amd64-microcode package in Ubuntu 14.04 as that release was already outside of the LTS timeframe when this hardware platform was launched.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
6.0 · Medium
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | High |
| User interaction | None |
| Scope | Changed |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N |