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CVE-2026-20775 Intel CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-11T17:17:52.357Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability affects Intel TDX modules within Ring 0: Trust Domain, potentially allowing a denial of service. System administrators and security teams responsible for Intel-based systems, especially those utilizing Intel TDX modules, should be aware of this vulnerability. The vulnerability requires local access and a privileged user combined with a high complexity attack to enable denial of service. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (high) impacts.

Vendor
Intel
Product
Intel TDX module
CVSS
MEDIUM 6.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-11
Original CVE updated
2026-08-31
Advisory published
2026-08-11
Advisory updated
2026-08-31

Who should care

System administrators and security teams responsible for Intel-based systems, especially those utilizing Intel TDX modules, should be aware of this vulnerability. The vulnerability requires local access and a privileged user combined with a high complexity attack to enable denial of service.

Technical summary

The vulnerability, CVE-2026-20775, is an uncaught exception in certain Intel TDX modules within Ring 0: Trust Domain, potentially allowing a denial of service. The vulnerability has a CVSS score of 6.8 and is classified as MEDIUM severity. The affected product is Intel TDX module. Local access is required for potential exploitation. The vulnerability impacts availability (high) but not confidentiality or integrity. The CVSS score of 6.8 indicates a medium severity level, suggesting that while the vulnerability is significant, it may not be easily exploitable. Intel TDX module versions up to 1.5.28 and 2.0.16 are affected.

Defensive priority

To address this vulnerability, prioritize inventory checks for Intel TDX module versions within the affected range (up to 1.5.28 and 2.0.16), verify system software adversary privilege levels, and monitor system logs for denial-of-service attempts.

Recommended defensive actions

  • Inventory Intel TDX module versions and compare to known vulnerable versions.
  • Verify system software adversary privilege levels.
  • Monitor system logs for denial-of-service attempts.
  • Implement compensating controls to limit adversary access.
  • Review and apply vendor remediation if available.

Evidence notes

The CVE description indicates an uncaught exception in certain Intel TDX modules within Ring 0: Trust Domain, potentially allowing a denial of service. The vulnerability has a CVSS score of 6.8 and is classified as MEDIUM severity. The affected product is Intel TDX module, with CPE criteria cpe:2.3:o:intel:tdx_module:*:*:*:*:*:*:*:* and cpe:2.3:o:intel:tdx_module:*:*:*:*:*:*:*:* up to version 1.5.28 and 2.0.16.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-20775 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-20775

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-20775 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-20775

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.