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CVE-2026-26104

Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api

5.5 MediumFix available

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.08%Up 0.1 points since Feb 25, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.5

Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

Record
CVE-2026-26104
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-862
Updated
2026-11-05
EUVDEUVD-2026-8635 5.5

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

Record
EUVD-2026-8635
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-05
GitHub AdvisoriesGHSA-hjgq-ff5j-5v2m 5.5

A flaw was found in the udisks storage management daemon that allows unprivileged users to back...

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

Record
GHSA-hjgq-ff5j-5v2m
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-862
Updated
2026-11-02
NVD 5.5

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

Record
CVE-2026-26104
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-862
Updated
2026-11-05
OSV 5.5

Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

Record
CVE-2026-26104
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-862
Updated
2026-11-07
OSVDEBIAN-CVE-2026-26104 5.5

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

Record
DEBIAN-CVE-2026-26104
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
Show 5 moreShow less
OSVRHSA-2026:3476 7.1

Red Hat Security Advisory: udisks2 security update

Record
RHSA-2026:3476
CVSS 3.1
7.1 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:5831 7.1

Red Hat Security Advisory: udisks2 security update

Record
RHSA-2026:5831
CVSS 3.1
7.1 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVRLSA-2026:3476 7.1

Important: udisks2 security update

The Udisks project provides a daemon, tools, and libraries to access and manipulate disks, storage devices, and technologies.

Security Fix(es):

  • udisks: Missing Authorization Check Allows Unprivileged Users to Back Up LUKS Headers via udisks D-Bus API (CVE-2026-26104)

  • udisks: Missing Authorization Check Allows Unprivileged Users to Restore LUKS Headers via udisks D-Bus API (CVE-2026-26103)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:3476
CVSS 3.1
7.1 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVALSA-2026:3476 No score

Important: udisks2 security update

The Udisks project provides a daemon, tools, and libraries to access and manipulate disks, storage devices, and technologies.

Security Fix(es):

  • udisks: Missing Authorization Check Allows Unprivileged Users to Back Up LUKS Headers via udisks D-Bus API (CVE-2026-26104)
  • udisks: Missing Authorization Check Allows Unprivileged Users to Restore LUKS Headers via udisks D-Bus API (CVE-2026-26103)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2026:3476
Updated
2026-11-02
OSVopenSUSE-SU-2026:10273-1 No score

libudisks2-0-2.11.0-2.1 on GA media

These are all security issues fixed in the libudisks2-0-2.11.0-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10273-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libudisks2
AlmaLinux:10
From an advisory covering 2 CVEs
 before 2.10.90-6.el10_1.1.alma.1
2.10.90-6.el10_1.1.alma.1
libudisks2-devel
AlmaLinux:10
From an advisory covering 2 CVEs
 before 2.10.90-6.el10_1.1.alma.1
2.10.90-6.el10_1.1.alma.1
udisks2
AlmaLinux:10
From an advisory covering 2 CVEs
 before 2.10.90-6.el10_1.1.alma.1
2.10.90-6.el10_1.1.alma.1
udisks2-iscsi
AlmaLinux:10
From an advisory covering 2 CVEs
 before 2.10.90-6.el10_1.1.alma.1
2.10.90-6.el10_1.1.alma.1
udisks2-lsm
AlmaLinux:10
From an advisory covering 2 CVEs
 before 2.10.90-6.el10_1.1.alma.1
2.10.90-6.el10_1.1.alma.1
udisks2-lvm2
AlmaLinux:10
From an advisory covering 2 CVEs
 before 2.10.90-6.el10_1.1.alma.1
2.10.90-6.el10_1.1.alma.1
udisks2
Debian:14
 before 2.11.1-1, plus listed versions
2.10.1-12.12.10.90-12.10.90-22.10.90-32.10.90-3.12.10.91-12.11.0-12.11.0-2
2.11.1-1
libudisks2
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
libudisks2-debuginfo
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
udisks2
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
Show 23 moreShow less
Affected packages
PackageAffectedFixed
udisks2-debuginfo
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
udisks2-debugsource
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
udisks2-iscsi
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
udisks2-iscsi-debuginfo
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
udisks2-lsm
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
udisks2-lsm-debuginfo
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
udisks2-lvm2
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
udisks2-lvm2-debuginfo
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
libudisks2-devel
Red Hat:enterprise_linux:10.1
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
libudisks2
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
libudisks2-debuginfo
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2-debuginfo
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2-debugsource
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2-iscsi
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2-iscsi-debuginfo
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2-lsm
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2-lsm-debuginfo
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2-lvm2
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2-lvm2-debuginfo
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
libudisks2-devel
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 2 CVEs
 before 0:2.10.90-5.el10_0.2
0:2.10.90-5.el10_0.2
udisks2
Rocky Linux:10
From an advisory covering 2 CVEs
 before 0:2.10.90-6.el10_1.1
0:2.10.90-6.el10_1.1
udisks2
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
 before 2.11.0-2.1
2.11.0-2.1

History

History
RecordedChangedSources
affectedEUVD, NVD
factsCVE List
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-26104 is a medium vulnerability (CVSS 5.5) in Freedesktop Udisks, published February 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.08%, the 0th percentile. Fixed in udisks2 2.11.1-1.

References

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