CVSS 4.0
5.6 mediumCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:NCVE-2026-18448 tianocore edk2
Medium (5.6) in tianocore edk2. EPSS 0.1% estimated probability of exploitation activity in the next 30 days.
On this page
EDK2 contains a vulnerability in BIOS
where a privileged attacker may cause “Exposure of Sensitive Information during
Transient Execution” by local access. Successful exploitation of
this vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality.
Severity
- EPSS
- 0.1% estimated probability of exploitation activity in the next 30 days; 3rd percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- Published
- Modified
- Assigned by
- TianoCore (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| TianoCore EDK2 | through edk2-stable202608 |
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12, 13, 14 | edk2 | no fix listed | DEBIAN-CVE-2026-18448 |
| Ubuntu | 22.04:LTS, 24.04:LTS, Pro:16.04:LTS and 2 more | edk2 | no fix listed | UBUNTU-CVE-2026-18448 |
| Ubuntu | 26.04:LTS, 26.10 | edk2, edk2-hwe | no fix listed | UBUNTU-CVE-2026-18448 |
| Azure Linux | 3 | edk2 | no fix listed | AZL-113383 |
| Azure Linux | 3 | qemu | no fix listed | AZL-113624 |
From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; Microsoft's Azure Linux vulnerability data, MIT. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu.