VU#431093: TCG TPM 2.0 reference code found vulnerable to information leakage and timing side-channel attacks

Summary

Overview Two vulnerabilities have been identified in the Trusted Platform Module (TPM) 2.0 reference implementation: CVE-2026-6726 – Information leakage via falsified TPM keys. CVE-2026-6727 – A timing side-channel vulnerability in RSA OAEP decryption. An attacker with privileged access to a TPM command interface may be able to exploit these vulnerabilities by sending specially crafted TPM commands. Successful exploitation could allow the attacker to decrypt ciphertexts encrypted to affected TPM-managed RSA keys, including the RSA Endorsement Key (EK), or obtain credentials for falsified TPM keys, enabling forged TPM 2.0 attestations. These vulnerabilities are also documented by the Trusted Computing Group (TCG) in advisories - TCGVRT010 and TCGVRT0011 : Description Trusted Platform Module (TPM) technology provides hardware-backed... Related CVEs: CVE-2026-6726, CVE-2026-6727.

Why it matters

CERT/CC notes often cover coordinated disclosures, multi-vendor exposure, infrastructure risk, or cases where remediation guidance is still developing.

Operator check

Review the CERT/CC Vulnerability Note and compare the affected vendor and product list against your inventory. Apply vendor fixes or compensating controls for TPM 2.0 reference code where available.

Sources