UEFI Firmware Vulnerability in Ubuntu Affects Secure Boot Configurations
CVE-2025-2486

3.7LOW

Key Information:

Vendor

Ubuntu

Status
Edk2
Vendor
CVE Published:
26 November 2025

What is CVE-2025-2486?

The Ubuntu edk2 UEFI firmware packages introduced a vulnerability that inadvertently enabled access to the UEFI Shell within Secure Boot environments. This flaw can lead to a potential bypass of Secure Boot constraints by allowing unauthorized operations. Although versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 have implemented changes to disable the Shell, earlier releases incorporated a secure-boot-centric decision mechanism that was deemed insufficient for maintaining Secure Boot restrictions. This serves as an additional remediation alongside the incomplete resolution initially addressed for a previous vulnerability.

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Affected Version(s)

edk2 aarch64 2024.05 < 2024.05-2ubuntu0.3

edk2 aarch64 2024.02 < 2024.02-2ubuntu0.3

References

https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2101797

CVSS V4

Score:
3.7
Severity:
LOW
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dann Frazier
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