CVE-2026-40097
Description
A flaw was found in Step CA, an online certificate authority. A remote attacker can trigger a Denial of Service (DoS) by sending a specially crafted attestation key (AK) certificate with an empty Extended Key Usage (EKU) extension during Trusted Platform Module (TPM) device attestation. This causes an index out-of-bounds panic, making the Step CA service unavailable. This vulnerability affects deployments configured for TPM device attestation.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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