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CVE-2026-20765: Escalation of Privilege in Intel(R) TDX Guest software

0
Medium
VulnerabilityCVE-2026-20765cvecve-2026-20765
Published: 08/11/2026 (08/11/2026, 16:26:04 UTC)
Source: CVE Database V5
Product: Intel(R) TDX Guest software

Description

CVE-2026-20765 is a medium severity escalation of privilege vulnerability in Intel(R) TDX Guest software versions before 0.3.1. It involves an incorrect comparison in 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. The vulnerability has low potential impact on confidentiality, integrity, and availability of the vulnerable system. No known exploits are reported in the wild, and no official patch or remediation guidance has been provided yet.

CVSS v4.0

Score 4.6medium

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
High
User Interaction
None
Vuln. Confidentiality
Low
Vuln. Integrity
Low
Vuln. Availability
Low
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/12/2026, 00:12:39 UTC

Technical Analysis

This vulnerability in Intel(R) TDX Guest software prior to version 0.3.1 arises from an incorrect comparison in Ring 3 user applications, which may allow escalation of privilege by a system software adversary possessing privileged user access. The attack requires local access, no user interaction, and low complexity, but does not require special internal knowledge. The potential impact is limited to low confidentiality, integrity, and availability impacts on the vulnerable system, with no subsequent broader system impacts reported. The CVSS 4.0 base score is 4.6, indicating medium severity. No patch or remediation level has been disclosed by the vendor as of the publication date.

Potential Impact

The vulnerability may allow a local system software adversary with privileged user rights to escalate privileges within the Intel(R) TDX Guest software environment. The impact on confidentiality, integrity, and availability is rated as low at the vulnerable system level, with no further impact on overall system confidentiality, integrity, or availability. There are no reports of exploitation in the wild.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or remediation level has been published, users should monitor Intel's advisories for updates. No specific mitigation steps are provided by the vendor at this time.

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Technical Details

Data Version
5.2
Assigner Short Name
intel
Date Reserved
2026-01-13T04:00:20.830Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a7b546abf8831d539106a45

Added to database: 08/11/2026, 16:57:14 UTC

Last enriched: 08/12/2026, 00:12:39 UTC

Last updated: 08/12/2026, 00:12:39 UTC

Views: 2

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