CVE-2025-2486
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
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.
Risk Assessment
Bypassing Secure Boot may allow unsigned or malicious boot components to run, undermining trust in the boot chain.
Recommendation
Update edk2 firmware packages to version 2024.05-2ubuntu0.3 or 2024.02-2ubuntu0.3 (or later).
Other vulnerabilities in edk2
See all- CVE-2025-2296High
EDK2 contains a vulnerability in BIOS where an attacker with local access may cause 'Improper Input Validation'. Successful exploitation could alter control flow unexpectedly, potentially allowing arbitrary command execution and impacting Confidentiality, Integrity, and Availability.
- CVE-2024-38798Medium
EDK2 contains a vulnerability in BIOS where an attacker may cause 'Exposure of Sensitive Information to an Unauthorized Actor' by local access. Successful exploitation may lead to information disclosure or privilege escalation and impact confidentiality.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS