SUSE-RU-2026:5112-1: important: Recommended update for shim

SLE-UPDATES null at suse.de
Thu Nov 5 12:30:36 UTC 2026 

# Recommended update for shim

Announcement ID: SUSE-RU-2026:5112-1  
Release Date: 2026-11-05T08:11:17Z  
Rating: important  
References:

  * bsc#1210382
  * bsc#1254336
  * bsc#1259096
  * bsc#1269084
  * bsc#1270036
  * bsc#1278729
  * bsc#1285863
  * jsc#PED-13361
  * jsc#PED-15978

  
Affected Products:

  * Basesystem Module 15-SP7
  * openSUSE Leap 15.3
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise High Performance Computing 15 SP5
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5
  * SUSE Linux Enterprise Micro 5.3
  * SUSE Linux Enterprise Micro 5.4
  * SUSE Linux Enterprise Micro 5.5
  * SUSE Linux Enterprise Micro for Rancher 5.3
  * SUSE Linux Enterprise Micro for Rancher 5.4
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server 15 SP4 LTSS
  * SUSE Linux Enterprise Server 15 SP5
  * SUSE Linux Enterprise Server 15 SP5 LTSS
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP6 LTSS
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

  
  
An update that contains two features and has seven fixes can now be installed.

## Description:

This update for shim fixes the following issues:

Support a nx-shim (jsc#PED-13361 jsc#PED-15978):

This marks data sections as "non executable" during the UEFI boot process.

shim-install: separate the logic of grabbing OS_ID When the GRUB_DISTRIBUTOR can
be grab by /etc/default/grub. The logic of grabbing OS_ID from os-release will
be ignored. For example: SL-Micro 6.1 has GRUB_DISTRIBUTOR="SL Micro" in
/etc/default/grub.

We always need OS_ID for subsequent processing logic. So this patch separate the
logic of grabbing OS_ID. (bsc#1285863#c14)

shim-install: refactory the logic of update_boot for fixing two issues Refactory
the logic of update_boot for updating EFI default boot path in shim-install and
fixed two issues:

  * The fallback efi NOT be copied to the default efi boot path for SLE
    (bsc#1285863)
  * The encrypted SL-Micro uses 'removable=yes' for TPM key unsealing. But the
    original logic did NOT copy MokManager to EFI default boot path.
    (bsc#1285863#11)

  * Add Requires tags for checking the grub2 sbat generation at RPM level, so we
    make sure we are not blocking the grub2 during boot. (bsc#1278729)

  * Use nx shim as the default shim binary for SLES 16.1 and newer in older
    versions the non-nx shim is default. The nx shim can still be selected.

  * shim-install: Do not update fallback on sl-micro when the fallback is not in
    efi default boot path

The SL-Micro SelfInstall image direct unpackage the raw image to the hard drive
on target machine. The kiwi produced the raw image by 'shim-install --removable'
command. So the raw image does NOT include fallback.efi in the EFI default boot
path (aka. the removable boot path, EFI/boot/). Looks that SL-Micro does NOT
care the fallback function of SUSE boot entry is lost. Normally, with or without
fallback.efi should NOT case problem when booting. Also, the distro (SL-Micro in
this case) does NOT care fallback function. But some issue machine's firmware
can ONLY boot with the removable boot path (aka. the default boot path,
/EFI/boot/bootx64.efi). And issue firmware always modified boot order or even
removed SUSE boot entry. It causes that the fallback.efi always be triggered in
every booting. The outward symptom is an endless cycle of rebooting and showing
the fallback prompt box. The above situation NOT be found before we fix
bsc#1254336. In bsc#1254336, the shim-install did NOT update the files in
removable boot path. e.g. /EFI/boot/bootx64.efi or /EFI/boot/fallback.efi. So we
will NOT update fallback.efi on SL-Micro when shim-install did NOT see fallback
in the removable boot path (EFI/boot/fallback.efi). No fallback.efi in the
removable boot path means that the target system is installed by wiki raw image.
(bsc#1270036)

  * Update shim-install to limit the scope of the 'removable' SL-Micro to the
    image booting with TPM2 unsealing (bsc#1210382)
  * shim-install: Add ca_string for SL Micro to update fallback loader
    (bsc#1254336)
  * Update change log for shim-install add ca_string for SL Micro to update
    fallback loader (bsc#1254336)
  * Modified the pretrans Lua script to work around the broken DB issue caused
    by buggy firmware when Secure Boot is disabled. (bsc#1259096)
  * shim-install: Improve the detection of SL Micro (bsc#1269084)

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * openSUSE Leap 15.3  
    zypper in -t patch SUSE-2026-5112

  * SUSE Linux Enterprise Server for SAP Applications 15 SP4  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-5112

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-5112

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-5112

  * SUSE Linux Enterprise Micro for Rancher 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-5112

  * SUSE Linux Enterprise Micro 5.3  
    zypper in -t patch SUSE-SLE-Micro-5.3-2026-5112

  * SUSE Linux Enterprise Server for SAP Applications 15 SP5  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP5-2026-5112

  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-5112

  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-5112

  * SUSE Linux Enterprise Micro for Rancher 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-5112

  * SUSE Linux Enterprise Micro 5.4  
    zypper in -t patch SUSE-SLE-Micro-5.4-2026-5112

  * SUSE Linux Enterprise Server for SAP Applications 15 SP6  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-5112

  * SUSE Linux Enterprise Micro 5.5  
    zypper in -t patch SUSE-SLE-Micro-5.5-2026-5112

  * SUSE Linux Enterprise Server 15 SP4 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-5112

  * Basesystem Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-5112

  * SUSE Linux Enterprise Server 15 SP5 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-5112

  * SUSE Linux Enterprise Server 15 SP6 LTSS  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-5112

## Package List:

  * openSUSE Leap 15.3 (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4 (x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 (aarch64
    x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 (aarch64
    x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Micro for Rancher 5.3 (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Micro 5.3 (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP5 (x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP5 (aarch64
    x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise High Performance Computing LTSS 15 SP5 (aarch64
    x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Micro for Rancher 5.4 (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Micro 5.4 (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6 (x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Micro 5.5 (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Server 15 SP4 LTSS (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * Basesystem Module 15-SP7 (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Server 15 SP5 LTSS (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1
  * SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 x86_64)
    * shim-16.1-150300.4.42.1
    * shim-debuginfo-16.1-150300.4.42.1
    * shim-debugsource-16.1-150300.4.42.1

## References:

  * https://bugzilla.suse.com/show_bug.cgi?id=1210382
  * https://bugzilla.suse.com/show_bug.cgi?id=1254336
  * https://bugzilla.suse.com/show_bug.cgi?id=1259096
  * https://bugzilla.suse.com/show_bug.cgi?id=1269084
  * https://bugzilla.suse.com/show_bug.cgi?id=1270036
  * https://bugzilla.suse.com/show_bug.cgi?id=1278729
  * https://bugzilla.suse.com/show_bug.cgi?id=1285863
  * https://jira.suse.com/browse/PED-13361
  * https://jira.suse.com/browse/PED-15978

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