Out-of-bounds Read in Tdx Module
CVE-2025-27940
Out-of-bounds read for some TDX Module before version tdx1.5 within Ring 0: Hypervisor may allow an information disclosure. Software side channel adversary with a privileged user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Vulnerability class: Buffer Overflow
EPSS: 0.001 (0.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N.
Affected products
- N/a Tdx Module — versions before version tdx1.5
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-27940?
- CVE-2025-27940 is a medium-severity vulnerability in Tdx Module, classified under Out-of-bounds Read. CVSS score: 4.1/10. Published 2026-02-10.
- How severe is CVE-2025-27940?
- Medium severity. CVSS v3 base score is 4.1 out of 10.