Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Trusted Computing Group | TPM2.0 | ≤ v184 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libtpms | No fix yet | — |
| Debian 13 | libtpms | No fix yet | — |
| Debian 12 | libtpms | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libtpms | No fix yet | — |
| Ubuntu 26.04 LTS | libtpms | No fix yet | — |
| Ubuntu 24.04 LTS | libtpms | No fix yet | — |
| Ubuntu 22.04 LTS | libtpms | No fix yet | — |
Advisories 2
- WID-SEC-2026-2756 Microsoft Windows Produkte: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 30, 2026
- NCSC-2026-0284 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Aug 11, 2026