CVE-2026-20885

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-20885
StatePUBLISHED
Assignerintel
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-11 17:17:53 UTC
Updated2026-08-31 14:33:23 UTC
DescriptionImproper authentication in the Intel(R) TDX module for some Intel(R) platforms within Ring 0: Trust Domain may allow an information disclosure and escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (low), integrity (low) and availability (none) impacts.

Risk And Classification

Primary CVSS: v4.0 7 HIGH from [email protected]

CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/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

EPSS: 0.001480000 probability, percentile 0.045550000 (date 2026-08-14)

Problem Types: CWE-287 | Escalation of Privilege, Information Disclosure | CWE-287 Improper Authentication | CWE-287 CWE-287 Improper Authentication

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary7HIGHCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/C...
4.0CNACVSS7HIGHCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
3.1[email protected]Primary7.2HIGHCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
High
Attack Requirements
Present
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Sub Conf.
Low
Sub Integrity
Low
Sub Availability
None

CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/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

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Intel Tdx Module All All All All
Hardware Intel Xeon Bronze 3408u - All All All
Hardware Intel Xeon Gold 5411n - All All All
Hardware Intel Xeon Gold 5412u - All All All
Hardware Intel Xeon Gold 5415 - All All All
Hardware Intel Xeon Gold 5416s - All All All
Hardware Intel Xeon Gold 5418n - All All All
Hardware Intel Xeon Gold 5418y - All All All
Hardware Intel Xeon Gold 5420 - All All All
Hardware Intel Xeon Gold 6414u - All All All
Hardware Intel Xeon Gold 6416h - All All All
Hardware Intel Xeon Gold 6418h - All All All
Hardware Intel Xeon Gold 6421n - All All All
Hardware Intel Xeon Gold 6426y - All All All
Hardware Intel Xeon Gold 6428n - All All All
Hardware Intel Xeon Gold 6430 - All All All
Hardware Intel Xeon Gold 6434 - All All All
Hardware Intel Xeon Gold 6434h - All All All
Hardware Intel Xeon Gold 6438m - All All All
Hardware Intel Xeon Gold 6438n - All All All
Hardware Intel Xeon Gold 6438y - All All All
Hardware Intel Xeon Gold 6442y - All All All
Hardware Intel Xeon Gold 6444y - All All All
Hardware Intel Xeon Gold 6448h - All All All
Hardware Intel Xeon Gold 6448y - All All All
Hardware Intel Xeon Gold 6454s - All All All
Hardware Intel Xeon Gold 6458q - All All All
Hardware Intel Xeon Platinum 8444h - All All All
Hardware Intel Xeon Platinum 8450h - All All All
Hardware Intel Xeon Platinum 8452y - All All All
Hardware Intel Xeon Platinum 8454h - All All All
Hardware Intel Xeon Platinum 8458p - All All All
Hardware Intel Xeon Platinum 8460h - All All All
Hardware Intel Xeon Platinum 8460y - All All All
Hardware Intel Xeon Platinum 8461v - All All All
Hardware Intel Xeon Platinum 8462y - All All All
Hardware Intel Xeon Platinum 8468 - All All All
Hardware Intel Xeon Platinum 8468h - All All All
Hardware Intel Xeon Platinum 8468v - All All All
Hardware Intel Xeon Platinum 8470 - All All All
Hardware Intel Xeon Platinum 8470n - All All All
Hardware Intel Xeon Platinum 8470q - All All All
Hardware Intel Xeon Platinum 8471n - All All All
Hardware Intel Xeon Platinum 8480 - All All All
Hardware Intel Xeon Silver 4410tm - All All All
Hardware Intel Xeon Silver 4410y - All All All
Hardware Intel Xeon Silver 4416 - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na IntelR Platforms affected See references Not specified

References

ReferenceSourceLinkTags
intel.com/content/www/us/en/security-center/advisory/intel-sa-01436.html [email protected] intel.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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