CVE-2023-31356
Publication date 13 August 2024
Last updated 26 August 2025
Ubuntu priority
Description
Incomplete system memory cleanup in SEV firmware could allow a privileged attacker to corrupt guest private memory, potentially resulting in a loss of data integrity.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| amd64-microcode | 25.04 plucky |
Not affected
|
| 24.04 LTS noble |
Fixed 3.20250311.1ubuntu0.24.04.1
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
Notes
rodrigo-zaiden
AMD SEV firmware were included in noble onwards, based on upstream release 20220411, releases older than that are not supported.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
4.4 · Medium
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | High |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-7561-1
- AMD Microcode vulnerabilities
- 9 June 2025