CVE-2025-2486 UEFI Shell accessible in AAVMF with Secure Boot enabled on Ubuntu
Attackers can access the UEFI Shell in Secure Boot environments, potentially bypassing Secure Boot constraints on Ubuntu systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-2486?
CVE-2025-2486 is a low-severity vulnerability in Ubuntu edk2, published on 26 Nov 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
The Ubuntu edk2 UEFI firmware packages accidentally allowed the UEFI Shell to be accessed in Secure Boot environments, possibly allowing bypass of Secure Boot constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based decision to continue running inside the Shell itself, which is believed to be sufficient to enforce Secure Boot restrictions. This is an additional repair on top of the incomplete fix for CVE-2023-48733.
Weakness: CWE-489
Which versions are affected by CVE-2025-2486?
It affects 1 product.
Products include Tianocore Edk2.
How do I fix CVE-2025-2486?
Apply the vendor's patch.
Is CVE-2025-2486 being exploited?
There is no known exploitation of CVE-2025-2486 in the wild and no public exploit code.
Other vulnerabilities in Ubuntu edk2
Sources
Also known as DEBIAN-CVE-2025-2486, GHSA-g658-h443-xpr6, UBUNTU-CVE-2025-2486.