April 14, 2026—KB5083768 (OS Build 28000.1836)

April 14, 2026—KB5083768 OS Build 28000.1836 ​​​​​This security update for Windows 11, version 26H1 KB5083768, includes the latest security improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates, optional...

DEBIAN-CVE-2026-34179

In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/fingerprint for restricted TLS certificate users, allowing a remote authenticated attacker to escalate...

grub2 security update

2.06-114.0.1.el97.1 - Update grub2 dependencies to match new Secure Boot certificate chain of trust Orabug: 37766761 - Fix typo in SBAT metadata Orabug: 37693946 - Allow installation of grub2 only with shim-aa64 that allows booting it Orabug: 37693946 - net/dns: Fix removal of DNS server Orabug:...

CLSA-2026-1773684091 Update of ca-certificates

update to CKBI 2.84 from NSS 3.121 - updated certificates: - Certificate "ePKI Root Certification Authority" - Certificate "GlobalSign Root CA" - Certificate "Entrust.net Premium 2048 Secure Server CA" - Certificate "Comodo AAA Services root" - Certificate "XRamp Global CA Root" - Certificate "Go...

March 10, 2026—KB5078885 (OS Builds 19045.7058 and 19044.7058)

March 10, 2026—KB5078885 OS Builds 19045.7058 and 19044.7058 Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely...

March 10, 2026—KB5078774 (Monthly Rollup)

March 10, 2026—KB5078774 Monthly Rollup 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 sure all Subset of endpoints for ESU only...

CLSA-2026-1772644297 Update of ca-certificates

update to CKBI 2.82 from NSS 3.120 - updated certificates: - Certificate "GlobalSign Root CA" - Certificate "Entrust.net Premium 2048 Secure Server CA" - Certificate "Comodo AAA Services root" - Certificate "XRamp Global CA Root" - Certificate "Go Daddy Class 2 CA" - Certificate "Starfield Class...

CLSA-2026-1772643782 Update of nss

update to CKBI 2.82 from NSS 3.120 - updated certificates: - Certificate "ePKI Root Certification Authority" - Certificate "GlobalSign Root CA" - Certificate "Entrust.net Premium 2048 Secure Server CA" - Certificate "Comodo AAA Services root" - Certificate "XRamp Global CA Root" - Certificate "Go...

DLA-4485-1 ca-certificates - CA certificates update

Bulletin has no description...

CLSA-2026-1771410337 Update of nss

update to CKBI 2.82 from NSS 3.120 - updated certificates: - Certificate "GlobalSign Root CA" - Certificate "Entrust.net Premium 2048 Secure Server CA" - Certificate "Comodo AAA Services root" - Certificate "XRamp Global CA Root" - Certificate "Go Daddy Class 2 CA" - Certificate "Starfield Class...

kernel security update

6.12.0-124.38.1 - Add new Oracle Linux Driver Signing key 1 certificate Orabug: 37985782 - Disable UKI signing Orabug: 36571828 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list...

CLSA-2026-1771005481 Update of nss

update to CKBI 2.82 from NSS 3.120 - updated certificates: - Certificate "ePKI Root Certification Authority" - Certificate "GlobalSign Root CA" - Certificate "Entrust.net Premium 2048 Secure Server CA" - Certificate "Comodo AAA Services root" - Certificate "XRamp Global CA Root" - Certificate "Go...

kernel security update

6.12.0-124.31.1 - Add new Oracle Linux Driver Signing key 1 certificate Orabug: 37985782 - Disable UKI signing Orabug: 36571828 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list...

kernel security update

6.12.0-124.29.1 - Add new Oracle Linux Driver Signing key 1 certificate Orabug: 37985782 - Disable UKI signing Orabug: 36571828 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list...

CVE-2026-21265

CVE-2026-21265 describes a Secure Boot bypass tied to expiration of Microsoft root certificates in the UEFI KEK/DB chain. Affected certificates include KEK CA 2011 (expires 2026-06-24), UEFI CA 2011 (expires 2026-06-27), and Windows Production PCA 2011 (expires 2026-10-19). The vulnerability aris...

kernel security update

5.14.0-611.20.1 - Disable UKI signing Orabug: 36571828 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list olkmodsigningkey.pem Orabug: 29539237 - Update x509.genkey Orabug:...

December 18, 2025—KB5074976 (OS Builds 19044.6693 and 19045.6693) Out-of-band

December 18, 2025—KB5074976 OS Builds 19044.6693 and 19045.6693 Out-of-band Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices t...

November 11, 2025—KB5068908 (Security-only update)

November 11, 2025—KB5068908 Security-only update Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not...

kernel security update

5.14.0-611.9.1 - Disable UKI signing Orabug: 36571828 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list olkmodsigningkey.pem Orabug: 29539237 - Update x509.genkey Orabug: 248176...

kernel security update

4.18.0-553.78.110.OL8 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list olkmodsigningkey.pem Orabug: 29539237 - Update x509.genkey Orabug: 24817676 - Conflict with shim-ia32 and...