CVE-2026-20763 Privilege escalation in Intel(R) TDX Guest software
A local attacker with privileged access can exploit incorrect calculations in Intel TDX Guest software to escalate privileges.
- 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-2026-20763?
CVE-2026-20763 is a medium-severity vulnerability in Intel(R) TDX Guest software, 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
Incorrect calculation for some Intel(R) TDX Guest software before version 0.3.1 within Ring 3: User Applications may allow an escalation of privilege. System software adversary with a privileged user combined with a low complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (low) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Weakness: CWE-682
Which versions are affected by CVE-2026-20763?
It affects 1 product.
Products include Intel Trust Domain Extensions Guest.
How do I fix CVE-2026-20763?
No fix has been published for CVE-2026-20763 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-20763 being exploited?
There is no known exploitation of CVE-2026-20763 in the wild and no public exploit code.
Other vulnerabilities in Intel(R) TDX Guest software
Sources
Also known as GHSA-wgvc-hf5h-m5h7.