CVE-2025-29934
Publication date 21 November 2025
Last updated 12 December 2025
Ubuntu priority
Description
A bug within some AMD CPUs could allow a local admin-privileged attacker to run a SEV-SNP guest using stale TLB entries, potentially resulting in loss of data integrity.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| amd64-microcode | 25.10 questing |
Vulnerable
|
| 25.04 plucky |
Vulnerable
|
|
| 24.04 LTS noble |
Vulnerable
|
|
| 22.04 LTS jammy |
Vulnerable
|
|
| 20.04 LTS focal |
Vulnerable
|
|
| 18.04 LTS bionic |
Vulnerable
|
|
| 16.04 LTS xenial |
Vulnerable
|
|
| 14.04 LTS trusty | Ignored no real-world users |
Notes
rodrigo-zaiden
most of the processors listed in the SB were 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 |
5.3 · Medium
|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | High |
| User interaction | None |
| Scope | Changed |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N |