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by Müller, Sabrina

T Cloud Public Images Release Notes April 2026

Linux

Discontinue Package Repositories of SUSE Linux Enterprise Server 12 (SLES-12)

OTC public image SLES 12 discontinued on 31st of October 2024.
Internal package repositories preconfigured in Enterprise_SLES_12 images will be available until 31st of August 2026.
Package repositories will be removed for all SLES 12 Service Packs.
https://imagefactory.otc.t-systems.com/package-repositories

More information about official SUSE support:
https://www.suse.com/de-de/lifecycle/

It is recommended to migrate existing ECS to

  • Enterprise_SLES15_SP7
  • Enterprise_SLES15_SP7_SAP

New image released: Enterprise SLES 16.0

  • Enterprise_SLES_16.0_amd64_uefi_latet pullst
  • Default login user: linux
  • Supported flavors: Flavor images
  • Official SLES 16.0 Release Notes: www.suse.com

Major Changes Included in Enterprise SLES 16.0

  • changing “Service Packs” (SPs) to “Minor Releases”

  • Agama

    • SLES 16 introduces Agama as the new system installer, replacing the YaST installer

  • Cockpit

    • For 1:1 remote management, SLES 16 transitions from YaST2 to Cockpit

  • Security Enhancements

    • SELinux is enabled by default as the primary Linux Security Module.
    • AppArmor remains optional but is no longer the default.

  • Networking Changes

    • NetworkManager is the unified default networking backend.
    • Wicked is deprecated distribution-wide.

  • Configuration Layout Modernization

    • Adopted the /usr/etc model:
      • Vendor defaults → /usr/etc
      • Administrator overrides → /etc

    !This avoids .rpmnew/ .rpmsave conflicts and supports modern update models.

Windows

Updated Microsoft Windows Server Images with current Microsoft Windows Server Patches of April 2026, 15th (20th for the oob update)

Windows Server 2025 2026-04 Cumulative Update (KB5082063) may fail with error 0x80073712. Therefore Microsoft releases an out-of-band update - KB5091157 - what is published on T-Cloud public WSUS servers as well.

  • New updates for Windows Server 2016

    • 2026-04 Cumulative Update for .NET Framework 4.8 for Windows Server 2016 for x64 (KB5082411)
    • 2026-04 Servicing Stack Update for Windows Server 2016 for x64-based Systems (KB5082089)
    • 2026-04 Cumulative Update for Windows Server 2016 for x64-based Systems (KB5082198)
    • Windows Malicious Software Removal Tool x64 - v5.140 (KB890830)

  • New updates for Windows Server 2019

    • 2026-04 Cumulative Update for .NET Framework 3.5, 4.7.2 and 4.8 for Windows Server 2019 for x64 (KB5084066)

    • 2026-04 Cumulative Update for Windows Server 2019 for x64-based Systems (KB5082123)

    • Windows Malicious Software Removal Tool x64 - v5.140 (KB890830)

    • added secure boot keys:

      • Current UEFI PK: Windows OEM Devices PK
      • Current UEFI KEK: Microsoft Corporation KEK CA 2011
      • Current UEFI DB: Microsoft Windows Production PCA 2011

  • New updates for Windows Server 2022

    • 2026-04 Cumulative Update for Microsoft server operating system version 21H2 for x64-based Systems (KB5082142)

    • 2026-04 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Microsoft server operating system version 21H2 for x64 (KB5084071)

    • Windows Malicious Software Removal Tool x64 - v5.140 (KB890830)

    • Microsoft Edge-Stable Channel Version 147 Update for x64 based Editions (Build 147.0.3912.60)

    • added secure boot keys:

      • Current UEFI PK: Windows OEM Devices PK
      • Current UEFI KEK: Microsoft Corporation KEK 2K CA 2023
      • Current UEFI DB: Windows UEFI CA 2023

  • New updates for Windows Server 2025

    • 2026-04 Cumulative Update for .NET Framework 3.5 and 4.8.1 for Microsoft server operating system version 24H2 for x64 (KB5082417)

    • Windows Malicious Software Removal Tool x64 - v5.140 (KB890830)

    • Microsoft Edge-WebView2 Runtime Version 147 Update for x64 based Editions (Build 147.0.3912.72)

    • Microsoft Edge-Stable Channel Version 147 Update for x64 based Editions (Build 147.0.3912.72)

    • 2026-04 Cumulative Update for Microsoft server operating system version 24H2 for x64-based Systems (KB5091157) (26100.32698)

    • added secure boot keys:

      • Current UEFI PK: Windows OEM Devices PK
      • Current UEFI KEK: Microsoft Corporation KEK 2K CA 2023
      • Current UEFI DB: Windows UEFI CA 2023

Updated Drivers and Tools

  • n/a

Unchanged Drivers and Tools

  • Cloudbase-Init: 1.1.6 (stable version) with OTC patch 1.0
    • service startup type is set to manual and triggerinfo is set to start/networkon (prevents error messages of not running cloudbase-init service)
  • .net Framework 4.8 (Windows Server 2016 and 2019 only)
  • virtIO KVM driver package version 0.1.262
  • Chocolatey client version 2.3.0
  • NVIDIA driver updates for solving CVE-2025-33219, CVE-2025-33220 - see https://nvidia.custhelp.com/app/answers/detail/a_id/5747
    • NVIDIA grid driver539.64 for Windows Server 2019, 2022, (2025 not officially supported) - Chocolatey Package OtcNvidiaDriverR535 539.64.0
    • NVIDIA grid driver 582.16 for Windows Server 2022, 2025 - no officiall OTC support - Chocolatey Package OtcNvidiaDriverR580 582.16.0
    • NVIDIA datacenter driver 582.16 for Windows Server 2022, 2025 (A100, H100 only)
    • NVIDIA datacenter driver 539.64 for Windows Server 2019 (A100, H100 only)