Vulnerability in Intel Trust Domain Extensions Guest
CVE-2026-20763
Incorrect calculation for some Intel(R) TDX Guest software before version 0.3.1 within Ring 3: User Applications may allow an escalation of privilege. System software adversary with a privileged user combined with a low complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (low) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.001 (3.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000
Affected products
- Intel Trust Domain Extensions Guest
- Intel(r) Tdx Guest Software — versions before version 0.3.1
Weakness classification (CWE)
References
- intel.com/content/www/us/en/security-center/advisory/intel-sa-01462.html (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20763?
- CVE-2026-20763 is a medium-severity vulnerability in Intel Trust Domain Extensions Guest, classified under Incorrect Calculation. CVSS score: 4.2/10. Published 2026-08-11.
- How severe is CVE-2026-20763?
- Medium severity. CVSS v3 base score is 4.2 out of 10.