CVE-2026-18448
Publication date 10 November 2026
Last updated 13 November 2026
Ubuntu priority
Description
Insufficient Transient Scheduler Attack (TSA) mitigations in EDK II could allow a ring-0 attacker to infer residual microarchitectural state left by SMM execution, potentially resulting in disclosure of SMRAM contents.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| edk2 | 26.10 stonking |
Needs evaluation
|
| 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
|
|
| edk2-hwe | 26.10 stonking |
Needs evaluation
|
| 26.04 LTS resolute |
Needs evaluation
|
|
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release |
Severity score breakdown
CVSS version: CVSS v4.0
Base score
5.6 · Medium
Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N