CVE-2026-21265 Secure Boot Certificate Expiration Security Feature Bypass Vulnerability

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CVE-2026-21265 Secure Boot Certificate Expiration Security Feature Bypass Vulnerability

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CVE-2025-71067

In the Linux kernel, the following vulnerability has been resolved: ntfs: set dummy blocksize to read bootblock when mounting When mounting, sb-sblocksize is used to read the bootblock without being defined or validated. Set a dummy blocksize before attempting to read the bootblock. The issue can...

CVE-2025-71067

In the Linux kernel, the following vulnerability has been resolved: ntfs: set dummy blocksize to read bootblock when mounting When mounting, sb-sblocksize is used to read the bootblock without being defined or validated. Set a dummy blocksize before attempting to read the bootblock. The issue can...

UBUNTU-CVE-2025-71067

In the Linux kernel, the following vulnerability has been resolved: ntfs: set dummy blocksize to read bootblock when mounting When mounting, sb-sblocksize is used to read the bootblock without being defined or validated. Set a dummy blocksize before attempting to read the bootblock. The issue can...

January 13, 2026—KB5073450 (OS Build 25398.2092)

January 13, 2026—KB5073450 OS Build 25398.2092 Applies To Windows Server, version 23H2 This cumulative update for Windows Server, version 23H2 KB5073450, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more...

January 13, 2026—KB5073455 (OS Build 22631.6491)

January 13, 2026—KB5073455 OS Build 22631.6491 Applies To Windows 11 version 23H2, all editions This cumulative update for Windows 11, version 23H2 KB5073455, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn...

January 13, 2026—KB5073457 (OS Build 20348.4648)

January 13, 2026—KB5073457 OS Build 20348.4648 Applies To Windows Server 2022 This cumulative update for Windows Server 2022 KB5073457, includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences...

January 13, 2026—KB5073695 (Monthly Rollup)

January 13, 2026—KB5073695 Monthly Rollup Applies To Windows Server 2008 R2 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and...

January 13, 2026—KB5073696 (Monthly Rollup)

January 13, 2026—KB5073696 Monthly Rollup Applies To Windows Server 2012 R2 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make...

January 13, 2026—KB5073697 (Monthly Rollup)

January 13, 2026—KB5073697 Monthly Rollup Applies To Windows Server 2008 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and business...

January 13, 2026—KB5073698 (Monthly Rollup)

January 13, 2026—KB5073698 Monthly Rollup Applies To Windows Server 2012 ESU Important The installation of this Extended Security Update ESU might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure al...

January 13, 2026—KB5073699 (Security-only update)

January 13, 2026—KB5073699 Security-only update Applies To Windows Server 2008 R2 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and...

January 13, 2026—KB5073700 (Security-only update)

January 13, 2026—KB5073700 Security-only update Applies To Windows Server 2008 Premium Assurance Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and...

January 13, 2026—KB5073723 (OS Build 17763.8276)

January 13, 2026—KB5073723 OS Build 17763.8276 Applies To Windows Server 2019 Win 10 Ent LTSC 2019 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and...

January 13, 2026—KB5073724 (OS Builds 19045.6809 and 19044.6809)

January 13, 2026—KB5073724 OS Builds 19045.6809 and 19044.6809 Applies To Windows 10 ESU Windows 10 Enterprise LTSC 2021 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of...

Secure Boot Certificate Expiration Security Feature Bypass Vulnerability

Windows Secure Boot stores Microsoft certificates in the UEFI KEK and DB. These original certificates are approaching expiration, and devices containing affected certificate versions must update them to maintain Secure Boot functionality and avoid compromising security by losing security fixes...

January 13, 2026—KB5073722 (OS Build 14393.8783)

January 13, 2026—KB5073722 OS Build 14393.8783 Applies To Windows Server 2016, all editions Win 10 Ent LTSB 2016 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain...

CVE-2025-71067 ntfs: set dummy blocksize to read boot_block when mounting

In the Linux kernel, the following vulnerability has been resolved: ntfs: set dummy blocksize to read bootblock when mounting When mounting, sb-sblocksize is used to read the bootblock without being defined or validated. Set a dummy blocksize before attempting to read the bootblock. The issue can...

CVE-2025-71067 ntfs: set dummy blocksize to read boot_block when mounting

In the Linux kernel, the following vulnerability has been resolved: ntfs: set dummy blocksize to read bootblock when mounting When mounting, sb-sblocksize is used to read the bootblock without being defined or validated. Set a dummy blocksize before attempting to read the bootblock. The issue can...