EUVD-2026-56490
GHSA-wgvc-hf5h-m5h7
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local attack vector and high privileges required match the 'system software adversary with privileged user' description; unchanged scope reflects zero subsequent-system impact; low C/I/A aligns with vendor-reported impact ratings.
Primary rating from Vendor (intel).
CVSS VectorVendor: intel
Lifecycle Timeline
1DescriptionCVE.org
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.
AnalysisAI
Privilege escalation in Intel TDX Guest software before version 0.3.1 stems from an incorrect calculation (CWE-682) within Ring 3 user application code, enabling a local, high-privilege adversary to elevate privileges within a Trust Domain. The CVSS 4.0 vector confirms local access with high privileges required and low C/I/A impact on the vulnerable system, with no subsequent-system (host/hypervisor) impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires local access to a system running Intel TDX Guest software prior to version 0.3.1 on Intel TDX-capable hardware (Sapphire Rapids or later), combined with a high-privilege account within the guest OS - described explicitly as a 'system software adversary with a privileged user.' No user interaction, no specialized internal knowledge (AT:N per CVSS 4.0), and no non-default configuration are required beyond that privileged foothold. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 4.6 (Medium) accurately reflects a tightly scoped vulnerability: the local attack vector (AV:L) and high privileges required (PR:H) confine the threat to adversaries who already hold elevated access inside a running TDX guest. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The definitive fix is to upgrade Intel TDX Guest software to version 0.3.1 or later, as specified by Intel advisory INTEL-SA-01462 (https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01462.html). … Detailed patch versions, workarounds, and compensating controls in full report. |
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More in Intel R Tdx Guest Software
View allSame weakness CWE-682 – Incorrect Calculation
View allSame technique Privilege Escalation
View allShare
External POC / Exploit Code
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