CVE-2025-2486 LOW

CVE-2025-2486: UEFI Shell accessible in AAVMF with Secure Boot enabled on Ubuntu

Vendor Ubuntu
Product edk2
Weakness CWE-489
Published November 26, 2025
Last update November 26, 2025
View on NVD All CVEs

CVSS base score

3.7/10
Attack vector Local
Attack complexity High
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H/E:U

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 26, 2025 CVE published
November 26, 2025 Record updated