The Trusted Platform Modules (TPM) reference software may not properly track the number of times a failed shutdown happens. This can leave…

Description

The Trusted Platform Modules (TPM) reference software may not properly track the number of times a failed shutdown happens. This can leave the TPM in a state where confidential key material in the TPM may be able to be compromised. AMD believes that the attack requires physical access of the device because the power must be repeatedly turned on and off. This potential attack may be used to change confidential information, alter executables signed by key material in the TPM, or create a denial of service of the device.

Scores

EPSS (exploitation in 30 days)

0.21% · top 88% of all CVEs (7 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.

Weakness

• CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition (opens in a new tab)All about CWE-367 and its CVEs

Affected products

• AMD's fTPM implementation

  • affected Each Linux distro determines its own version.

References (1)

• https://www.amd.com/en/corporate/product-security (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2020-12926](https://trackcve.app/badge/CVE-2020-12926.svg)](https://trackcve.app/cve/CVE-2020-12926)

Record last updated 4 Aug 2024, 12:11 UTC.