CVE-2026-6727
MediumCVSS 5.9Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker may exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to TPM-managed RSA keys, including the Endorsement Key (EK). Under certain conditions, this may also enable forgery of TPM 2.0 attestations.
Risk Assessment
Risk of compromise of TPM-managed keys and encrypted data, potentially leading to attestation forgery and integrity attacks.
Recommendation
Apply vendor patches (refer to TCGVRT0011) and restrict access to the TPM command interface to authorized users only.
Original NVD description (English source)
A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to TPM-managed RSA keys, including the RSA Endorsement Key (EK), including import blobs, credential blobs, and session salts. Under certain conditions, this may also enable the forgery of TPM 2.0 attestations. Refer to TCGVRT0011.