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.
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Affected Vendors & Products
References
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| https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2101797 |
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History
Wed, 26 Nov 2025 19:15:00 +0000
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Wed, 26 Nov 2025 17:45:00 +0000
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| 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. | |
| Title | UEFI Shell accessible in AAVMF with Secure Boot enabled on Ubuntu | |
| Weaknesses | CWE-489 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: canonical
Published: 2025-11-26T17:33:17.506Z
Updated: 2025-11-26T18:25:29.426Z
Reserved: 2025-03-18T01:16:20.240Z
Link: CVE-2025-2486
Updated: 2025-11-26T18:25:21.850Z
Status : Received
Published: 2025-11-26T18:15:48.357
Modified: 2025-11-26T18:15:48.357
Link: CVE-2025-2486
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