Bug 2433717 (CVE-2026-26104) - CVE-2026-26104 udisks: Missing Authorization Check Allows Unprivileged Users to Back Up LUKS Headers via udisks D-Bus API
Summary: CVE-2026-26104 udisks: Missing Authorization Check Allows Unprivileged Users ...
Keywords:
Status: NEW
Alias: CVE-2026-26104
Deadline: 2026-02-25
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2442587 2442588
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-01-28 07:49 UTC by OSIDB Bzimport
Modified: 2026-04-24 14:15 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:3476 0 None None None 2026-03-02 01:36:25 UTC
Red Hat Product Errata RHSA-2026:5831 0 None None None 2026-03-25 18:43:21 UTC

Description OSIDB Bzimport 2026-01-28 07:49:25 UTC 
Missing authorization (polkit) vulnerability in the org.freedesktop.UDisks2.Encrypted.HeaderBackup D-Bus method of udisks. The flaw is caused by the absence of a call to udisks_daemon_util_check_authorization_sync() in the handle_header_backup() handler. An unprivileged local user can invoke this system-bus method to cause the root-owned udisks daemon to call bd_crypto_luks_header_backup() and export LUKS headers and keyslot metadata to an arbitrary file path. This allows unauthorized disclosure of sensitive cryptographic material without authentication or user interaction.
Comment 2 errata-xmlrpc 2026-03-02 01:36:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:3476 https://access.redhat.com/errata/RHSA-2026:3476
Comment 3 errata-xmlrpc 2026-03-25 18:43:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:5831 https://access.redhat.com/errata/RHSA-2026:5831
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