CVE-2026-20763: Escalation of Privilege in Intel(R) TDX Guest software
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.
AI Analysis
Technical Summary
This vulnerability in Intel(R) TDX Guest software prior to version 0.3.1 arises from incorrect calculations in Ring 3 user applications. A system software adversary possessing privileged user access can exploit this flaw through a low complexity local attack to escalate privileges. The attack requires no user interaction and does not need special internal knowledge. The vulnerability impacts the confidentiality, integrity, and availability of the vulnerable component at a low level, with no further impact on the overall system's confidentiality, integrity, or availability.
Potential Impact
The vulnerability allows escalation of privilege by a system software adversary with privileged user access via a low complexity local attack. The impact on the vulnerable system's confidentiality, integrity, and availability is low. There are no reported subsequent impacts on the overall system's confidentiality, integrity, or availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary fix has been documented at this time. Users should monitor Intel's advisories for updates and apply any forthcoming patches promptly.
CVE-2026-20763: Escalation of Privilege in Intel(R) TDX Guest software
Description
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.
CVSS v4.0
Score 4.6medium
Affected software
Intel(R) TDX Guest software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Intel(R) TDX Guest software prior to version 0.3.1 arises from incorrect calculations in Ring 3 user applications. A system software adversary possessing privileged user access can exploit this flaw through a low complexity local attack to escalate privileges. The attack requires no user interaction and does not need special internal knowledge. The vulnerability impacts the confidentiality, integrity, and availability of the vulnerable component at a low level, with no further impact on the overall system's confidentiality, integrity, or availability.
Potential Impact
The vulnerability allows escalation of privilege by a system software adversary with privileged user access via a low complexity local attack. The impact on the vulnerable system's confidentiality, integrity, and availability is low. There are no reported subsequent impacts on the overall system's confidentiality, integrity, or availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary fix has been documented at this time. Users should monitor Intel's advisories for updates and apply any forthcoming patches promptly.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- intel
- Date Reserved
- 2026-01-13T04:00:20.875Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a7b546abf8831d539106a42
Added to database: 08/11/2026, 16:57:14 UTC
Last enriched: 08/12/2026, 00:12:45 UTC
Last updated: 09/26/2026, 01:47:40 UTC
Views: 26
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