CVE-2025-22840
Publication date 12 August 2025
Last updated 11 November 2025
Ubuntu priority
Description
Sequence of processor instructions leads to unexpected behavior for some Intel(R) Xeon(R) 6 Scalable processors may allow an authenticated user to potentially enable escalation of privilege via local access
From the Ubuntu Security Team
It was discovered that some Intel® Xeon® 6 Scalable processors did not properly handle a specific sequence of processor instructions, leading to unexpected behavior. A local authenticated user could potentially use this issue to escalate their privileges.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| intel-microcode | 25.10 questing |
Fixed 3.20250812.0ubuntu0.25.10.1
|
| 25.04 plucky |
Fixed 3.20250812.0ubuntu0.25.04.1
|
|
| 24.04 LTS noble |
Fixed 3.20250812.0ubuntu0.24.04.1
|
|
| 22.04 LTS jammy |
Fixed 3.20250812.0ubuntu0.22.04.1
|
|
| 20.04 LTS focal |
Fixed 3.20250812.0ubuntu0.20.04.1+esm1
|
|
| 18.04 LTS bionic |
Fixed 3.20250812.0ubuntu0.18.04.1+esm1
|
|
| 16.04 LTS xenial |
Fixed 3.20250812.0ubuntu0.16.04.1+esm1
|
|
| 14.04 LTS trusty | Ignored see notes |
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rodrigo-zaiden
trusty cannot use intel-microcode during early boot and is therefore generally not updated.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.4 · High
|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | Required |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L |
References
Related Ubuntu Security Notices (USN)
- USN-7866-1
- Intel Microcode vulnerabilities
- 10 November 2025