A timing side-channel vulnerability exists in the RSA OAEP decryption implementation.
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-208.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Trusted Computing Group | TPM2.0 | up to v184 | — | No fix listed | CNA |
- TPM2.0 VendorTrusted Computing Group Affected up to v184 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-6727
- 2026-10-03 Alias added: GHSA-fv5r-gp2c-7mwv
References
More Trusted Computing Group vulnerabilities
- TI-2023-00962 TPM2.0 vulnerable to out-of-bounds write CVSS 3.1HIGH 7.8
- TI-2026-05892 An information leakage vulnerability in the TCG TPM 2.0 reference code. CVSS 3.1HIGH 7.9
- TI-2012-00643 tcsd in TrouSerS before 0.3.10 allows remote attackers to cause a denial of service… CVSS 2.0MEDIUM 5.0
- TI-2023-00963 TPM2.0 vulnerable to out-of-bounds read CVSS 3.1MEDIUM 5.5
- TI-2018-04880 An issue was discovered that affects all producers of BIOS firmware who make a certain… CVSS 3.0HIGH 7.1
- TI-2020-16360 Trusted Computing Group (TCG) Trusted Platform Module Library Family 2.0 Library… CVSS 3.1HIGH 7.2
Sources
- CVE-2026-6727 · CVE Program
- CVE-2026-6727 · NVD
- FIRST EPSS
- GHSA-fv5r-gp2c-7mwv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences