Use of Predictable Algorithm in Random Number Generator Affecting keylime package, versions [7.14.0,7.14.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 May 2026
- disclosed6 May 2026
- creditUnknown
Introduced: 6 May 2026
NewCVE-2026-6420 (opens in a new tab)How to fix?
Upgrade keylime to version 7.14.2 or higher.
Overview
keylime is a TPM-based key bootstrapping and system integrity measurement system for cloud
Affected versions of this package are vulnerable to Use of Predictable Algorithm in Random Number Generator in the generate_challenge() method. An attacker can evade detection and bypass security controls by replaying previously captured TPM quotes due to the use of a hardcoded nonce value. This is only exploitable if the deployment is configured in push model mode.
Workaround
This vulnerability can be mitigated by enabling the TPM clock monotonicity check, which limits each quote to a single replay, and by using the push attestation timeout to constrain the quote generation window.