Bug 2417316 (CVE-2025-2486)

Summary: CVE-2025-2486 edk2: edk2: UEFI Shell access in Secure Boot environments allows bypass of Secure Boot constraints
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in edk2. This vulnerability allows bypass of Secure Boot (Unified Extensible Firmware Interface) constraints via accidentally allowing the UEFI Shell to be accessed in Secure Boot environments.
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Description OSIDB Bzimport 2025-11-26 18:01:49 UTC
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.