CVE-2026-20763: Escalation of Privilege in Intel(R) TDX Guest software
CVE-2026-20763 is a medium severity escalation of privilege vulnerability in Intel(R) TDX Guest software before version 0.3.1. It involves incorrect calculation within Ring 3 user applications that may allow a system software adversary with privileged user access to escalate privileges via a low complexity local attack without user interaction or special internal knowledge. The vulnerability has low impact on confidentiality, integrity, and availability of the vulnerable system, with no subsequent system-level impacts reported.
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
CVE-2026-20763 is a medium severity escalation of privilege vulnerability in Intel(R) TDX Guest software before version 0.3.1. It involves incorrect calculation within Ring 3 user applications that may allow a system software adversary with privileged user access to escalate privileges via a low complexity local attack without user interaction or special internal knowledge. The vulnerability has low impact on confidentiality, integrity, and availability of the vulnerable system, with no subsequent system-level impacts reported.
CVSS v4.0
Score 4.6medium
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
- Remediation Level
- null
Threat ID: 6a7b546abf8831d539106a42
Added to database: 08/11/2026, 16:57:14 UTC
Last enriched: 08/12/2026, 00:12:45 UTC
Last updated: 08/12/2026, 00:12:45 UTC
Views: 3
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