CVE-2026-6727 CVE-2026-6727
A local attacker can exploit timing side-channels in TPM RSA decryption to recover keys and forge attestations, requiring firmware updates.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6727?
CVE-2026-6727 is a medium-severity vulnerability in Trusted Computing Group TPM2.0, published on 11 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-208
Which versions are affected by CVE-2026-6727?
How do I fix CVE-2026-6727?
No fix has been published for CVE-2026-6727 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-6727 being exploited?
There is no known exploitation of CVE-2026-6727 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-6727, GHSA-fv5r-gp2c-7mwv, UBUNTU-CVE-2026-6727.