Vulnerability-Lookup

OPENSUSE-SU-2026:20878-1

Vulnerability from csaf_opensuse - Published: 2026-06-02 09:18 - Updated: 2026-09-30 11:19

Summary

Security update for sdbootutil

Severity

Important

Notes

Title of the patch: Security update for sdbootutil

Description of the patch: 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).

Patchnames: openSUSE-Leap-16.0-868

CVE-2026-25701

7.3 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

Affected products

Recommended 9 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:sdbootutil-0:1+git20260506.25d47bf-160000.1.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:sdbootutil-0:1+git20260506.25d47bf-160000.1.1.x86_64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:sdbootutil-bash-completion-0:1+git20260506.25d47bf-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:sdbootutil-dracut-measure-pcr-0:1+git20260506.25d47bf-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:sdbootutil-enroll-0:1+git20260506.25d47bf-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:sdbootutil-jeos-firstboot-enroll-0:1+git20260506.25d47bf-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:sdbootutil-kernel-install-0:1+git20260506.25d47bf-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:sdbootutil-snapper-0:1+git20260506.25d47bf-160000.1.1.noarch	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:sdbootutil-tukit-0:1+git20260506.25d47bf-160000.1.1.noarch	—	Vendor Fix

Threats

Impact important

References

16 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1243889	self
https://bugzilla.suse.com/1247952	self
https://bugzilla.suse.com/1252871	self
https://bugzilla.suse.com/1253652	self
https://bugzilla.suse.com/1254317	self
https://bugzilla.suse.com/1254534	self
https://bugzilla.suse.com/1254865	self
https://bugzilla.suse.com/1256775	self
https://bugzilla.suse.com/1257612	self
https://bugzilla.suse.com/1258241	self
https://bugzilla.suse.com/1258944	self
https://www.suse.com/security/cve/CVE-2026-25701/	self
https://www.suse.com/security/cve/CVE-2026-25701	external
https://bugzilla.suse.com/1258241	external

JSON

To clipboard

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  "vulnerabilities": [
    {
      "cve": "CVE-2026-25701",
      "ids": [
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          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-25701"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "An Insecure Temporary File vulnerability in openSUSE sdbootutil allows local users to  pre-create a directory to achieve various effects like:\n  *  gain access to possible private information found in /var/lib/pcrlock.d\n  *  manipulate the data backed up in /tmp/pcrlock.d.bak, therefore violating the integrity of the data should it be restored.\n  *    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.\n\n\nThis issue affects sdbootutil: from ? before 5880246d3a02642dc68f5c8cb474bf63cdb56bca.",
          "title": "CVE description"
        }
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CVE-2026-25701 (GCVE-0-2026-25701)

Vulnerability from cvelistv5 – Published: 2026-02-25 10:59 – Updated: 2026-02-25 20:50

Summary

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.

Severity

7 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-25 20:49 UTC

CWE

CWE-377 - Insecure Temporary File

Assigner

suse mitre root Scorecard

References

1 reference

URL	Tags
https://bugzilla.suse.com/show_bug.cgi?id=1258241

Impacted products

1 product

Vendor	Product	Version
openSUSE	sdbootutil	Affected: ? , < 5880246d3a02642dc68f5c8cb474bf63cdb56bca (git)

Date Public

2026-02-18 08:18

Credits

Matthias Gerstner of SUSE

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

OPENSUSE-SU-2026:20878-1

CVE-2026-25701 (GCVE-0-2026-25701)

Tags

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Nomenclature

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