CVE-2025-22839
Publication date 12 August 2025
Last updated 21 October 2025
Ubuntu priority
Description
Insufficient granularity of access control in the OOB-MSM for some Intel(R) Xeon(R) 6 Scalable processors may allow a privileged user to potentially enable escalation of privilege via adjacent access.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| intel-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 see notes |
Notes
rodrigo-zaiden
trusty cannot use intel-microcode during early boot and is therefore generally not updated.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Adjacent |
| Attack complexity | High |
| Privileges required | High |
| User interaction | None |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L |