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OpenAdvisories
High · 7.0 CVE-2026-20885 EUVD-2026-56505GHSA-9cwm-qgv5-93vq

Improper authentication in the Intel(R) TDX module for some Intel(R) platforms within Ring 0: Trust Domain may allow an information disclos…

Published Aug 11, 2026 · Updated Aug 12, 2026 · Assigned by intel

Description

Improper 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.

Affected products

VendorProductAffectedFixed
— Intel(R) platforms See references —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 8 microcode_ctl 4:20260812-1.0.3.el8_10 ELSA-2026-500239

Advisories 1

References