cbcvebase.
CVE-2025-2486
published 2025-11-26

CVE-2025-2486: The Ubuntu edk2 UEFI firmware packages accidentally allowed the UEFI Shell to be accessed in Secure Boot environments, possibly allowing bypass of Secure Boot…

low3.7CVSS 4.0
AVLACHATNPRNUIAVCNVIHVANSCHSIHSAHEUCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
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.

Affected

17 ranges
VendorProductVersion rangeFixed in
debianedk2< edk2 2022.11-6+deb12u1 (bookworm)edk2 2022.11-6+deb12u1 (bookworm)
msrcazl3_edk2_20240524git3e722403cd16-10_on_azure_linux_3.0——
msrcazl3_edk2_20240524git3e722403cd16-11_on_azure_linux_3.0——
msrcazl3_qemu_8.2.0-23_on_azure_linux_3.0——
msrcazl3_qemu_8.2.0-25_on_azure_linux_3.0——
msrccbl2_edk2_20230301gitf80f052277c8-43_on_cbl_mariner_2.0——
msrccbl2_edk2_20230301gitf80f052277c8-44_on_cbl_mariner_2.0——
msrccbl2_hvloader_1.0.1-14_on_cbl_mariner_2.0——
msrccbl2_hvloader_1.0.1-15_on_cbl_mariner_2.0——
msrccbl2_qemu_6.2.0-25_on_cbl_mariner_2.0——
msrccbl2_qemu_6.2.0-26_on_cbl_mariner_2.0——
tianocoreedk2——
tianocoreedk2——
tianocoreedk2>= 0 < 2020.11-2+deb11u22020.11-2+deb11u2
tianocoreedk2>= 0 < 2022.11-6+deb12u12022.11-6+deb12u1
tianocoreedk2>= 0 < 2023.11-72023.11-7
tianocoreedk2>= 0 < 2023.11-72023.11-7

CVSS provenance

nvdv4.03.7LOWCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
osv6.7MEDIUM