CVE-2025-27940 Information disclosure in TDX Module
A local privileged attacker can exploit an out-of-bounds read in the Intel TDX Module to disclose sensitive information via a side-channel attack.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-27940?
CVE-2025-27940 is a medium-severity vulnerability in TDX Module, published on 10 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-125
Which versions are affected by CVE-2025-27940?
How do I fix CVE-2025-27940?
No fix has been published for CVE-2025-27940 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-27940 being exploited?
There is no known exploitation of CVE-2025-27940 in the wild and no public exploit code.
Sources
Also known as GHSA-cjvx-jh2c-prqx.