EUVD-2026-56491
GHSA-56j3-r4r2-x3x6
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-only access (AV:L), pre-existing high privileges required (PR:H), and impact limited to low C/I/A with no scope change per description and vendor 4.0 vector.
Primary rating from Vendor (intel).
CVSS VectorVendor: intel
Lifecycle Timeline
1DescriptionCVE.org
Incorrect comparison 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 comparison (CWE-697) within Ring 3 user application space, exploitable by a local attacker who already holds high system privileges. Impact is limited - low confidentiality, integrity, and availability degradation on the vulnerable guest system with no subsequent system impact - aligning with the CVSS 4.0 score of 4.6. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) local access to the target system running Intel TDX Guest software before version 0.3.1; (2) the attacker must already possess high system-level privileges (PR:H per CVSS 4.0 vector) - described as a 'system software adversary with a privileged user'; (3) no user interaction is required (UI:N); (4) no special attack timing or environmental conditions are needed (AT:N, AC:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate-to-low despite the privilege escalation label. … 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 primary fix is upgrading Intel TDX Guest software to version 0.3.1 or later, as released by Intel via 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-697 – Incorrect Comparison
View allSame technique Privilege Escalation
View allShare
External POC / Exploit Code
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