CVE-2026-20885: Improper authentication in the Intel(R) TDX module for some Intel(R) platforms within Ring 0: Trust Domain may

Q: How do I fix CVE-2026-20885?

tdx module: upgrade to newer than 2.0.16. Exact commands for each OS are on this page.

Q: Is CVE-2026-20885 being exploited?

CVE-2026-20885 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-20885 affect?

CVE-2026-20885 affects tdx module. Severity is high (CVSS 7.2). 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 hig

Routine

HIGH 7.2UPGRADE

CVE-2026-20885 is a high-severity flaw (CVSS 7.2) affecting tdx module. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 interactio

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 96%)
CISA exploited list	No
Weakness	CWE-287
Published	2026-08-11
Last modified	2026-08-31

Publisher (CNA): Intel Corporation · Vendor: intel

Last updated 2026-08-31 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-11 17:17 UTCPublished CVE record published
2026-08-31 14:33 UTCUpdated Record last modified

intel tdx module UPGRADE

Affected: <= 1.5.28 · <= 2.0.16

Fixed in: newer than 2.0.16

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-20885?

tdx module: upgrade to newer than 2.0.16. Exact commands for each OS are on this page.

Is CVE-2026-20885 being exploited?

CVE-2026-20885 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-20885 affect?

CVE-2026-20885 affects tdx module. Severity is high (CVSS 7.2). 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 hig

How urgent is CVE-2026-20885?

Priority 26/100. High severity

Software pages

Intel vulnerabilities

Related CVEs

CVE-2026-20775 MEDIUM 5.3 UPGRADE Uncaught exception for some Intel(R) TDX modules within Ring 0: Trust Domain may allow a denial of service
CVE-2026-20705 MEDIUM 5.3 UPGRADE Insecure storage of sensitive information in the Intel(R) TDX module for some Intel(R) platform within Ring 0:

References

← Back to latest CVEs