CVE-2025-31936
Publication date 13 August 2026
Last updated 13 August 2026
Ubuntu priority
Description
Improper handling of overlap between protected memory ranges for some Intel(R) Xeon(R) 6 processors when using Intel(R) TDX within SMM may allow an escalation of privilege. SMM adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present with special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| intel-microcode | 26.04 LTS resolute |
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 |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v4.0
Base score
7.0 · High
Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2025-31936
- https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/releases/tag/microcode-20260811
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01379.html
- https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01379.html