CVE-2026-25701

An Insecure Temporary File vulnerability in openSUSE sdbootutil allows local users to pre-create a directory to achieve various effects like:

• gain access to possible private information found in /var/lib/pcrlock.d
• manipulate the data backed up in /tmp/pcrlock.d.bak, therefore violating the integrity of the data should it be restored.
•  overwrite protected system files with data from /var/lib/pcrlock.d by placing symlinks to existing files in the directory tree in /tmp/pcrlock.d.bak.

This issue affects sdbootutil: from ? before 5880246d3a02642dc68f5c8cb474bf63cdb56bca.

An Insecure Temporary File vulnerability in openSUSE sdbootutil allows local users to pre-create a directory to achieve various effects like:

• gain access to possible private information found in /var/lib/pcrlock.d
• manipulate the data backed up in /tmp/pcrlock.d.bak, therefore violating the integrity of the data should it be restored.
•  overwrite protected system files with data from /var/lib/pcrlock.d by placing symlinks to existing files in the directory tree in /tmp/pcrlock.d.bak.

This issue affects sdbootutil: from ? before 5880246d3a02642dc68f5c8cb474bf63cdb56bca.

An Insecure Temporary File vulnerability in openSUSE sdbootutil allows local users to pre-create a directory to achieve various effects like:

• gain access to possible private information found in /var/lib/pcrlock.d
• manipulate the data backed up in /tmp/pcrlock.d.bak, therefore violating the integrity of the data should it be restored.
•  overwrite protected system files with data from /var/lib/pcrlock.d by placing symlinks to existing files in the directory tree in /tmp/pcrlock.d.bak.

This issue affects sdbootutil: from ? before 5880246d3a02642dc68f5c8cb474bf63cdb56bca.

An Insecure Temporary File vulnerability in openSUSE sdbootutil allows local users to pre-create a directory to achieve various effects like:

• gain access to possible private information found in /var/lib/pcrlock.d
• manipulate the data backed up in /tmp/pcrlock.d.bak, therefore violating the integrity of the data should it be restored.
•  overwrite protected system files with data from /var/lib/pcrlock.d by placing symlinks to existing files in the directory tree in /tmp/pcrlock.d.bak.

This issue affects sdbootutil: from ? before 5880246d3a02642dc68f5c8cb474bf63cdb56bca.

These are all security issues fixed in the sdbootutil-1+git20260303.90d816d-1.1 package on the GA media of openSUSE Tumbleweed.

This update for sdbootutil fixes the following issues

Security issue:

• CVE-2026-25701: use of fixed directory /tmp/pcrlock.d.back in sdbootutil-update-predictions.service (bsc#1258241).

Non security issues:

Update to version 1+git20260506.25d47bf:

• TPM based system does not auto-unlock encryption (bsc#1257612).
• openQA test fails in reboot_after_installation - sdbootutil does not honor timeout set by user (bsc#1258944).
• Installation with Systemd-boot fails when Turkish language is selected (bsc#1253652).
• armv7 installer requires sdbootutil and shim on armv7 (bsc#1254865).
• sdbootutil default entry not updated after update from 20250411 to 20250522 (bsc#1243889).
• sdbootutil: consistent naming conventions used for key/pin ? (bsc#1252871).
• UPDATE_NVRAM is NO when BLS bootloader is used (bsc#1247952).
• Use tmpfiles.d for /var directories (jsc#PED-14900).
• yast reports "Cannot enroll authentication" during fresh install of tumbleweed (bsc#1256775).