December 9, 2025—KB5071506 (Security-only update)

None None...

December 9, 2025—KB5071546 (OS Builds 19045.6691 and 19044.6691)

None None...

October 14, 2025—KB5066835 (OS Builds 26200.6899 and 26100.6899)

None None...

October 14, 2025—KB5066836 (OS Build 14393.8519)

None None...

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 constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based...

nitro-tpm-pcr-compute may allow kernel command line modification by an account operator

Summary Adding default PCR12 validation to ensure that account operators can not modify kernel command line parameters, potentially bypassing root filesystem integrity validation. Attestable AMIs are based on the systemd Unified Kernel Image UKI concept which uses systemd-boot to create a single...

GHSA-XRV8-2PF5-F3Q7 nitro-tpm-pcr-compute may allow kernel command line modification by an account operator

Summary Adding default PCR12 validation to ensure that account operators can not modify kernel command line parameters, potentially bypassing root filesystem integrity validation. Attestable AMIs are based on the systemd Unified Kernel Image UKI concept which uses systemd-boot to create a single...

SUSE 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 constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based...

UEFI Shell accessible in AAVMF with Secure Boot enabled on Ubuntu

...

EUVD-2025-199745

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...

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 constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based...

DEBIAN-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 constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based...

UBUNTU-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 constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based...

CVE-2025-2486

The CVE-2025-2486 issue affects Ubuntu edk2 UEFI firmware packages where the UEFI Shell could be accessed with Secure Boot enabled, potentially bypassing Secure Boot constraints. Affected firmware versions are 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3, which disable the Shell; prior versions repo...

CVE-2025-2486 UEFI Shell accessible in AAVMF with Secure Boot enabled on Ubuntu

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...

CVE-2025-2486 UEFI Shell accessible in AAVMF with Secure Boot enabled on Ubuntu

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...

CVE-2025-2486 UEFI Shell accessible in AAVMF with Secure Boot enabled on Ubuntu

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...

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 constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based...

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 constraints. Versions 2024.05-2ubuntu0.3 and 2024.02-2ubuntu0.3 disable the Shell. Some previous versions inserted a secure-boot-based...

CVE-2025-2486: Active Debug Code

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...