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Udisks CVE-2026-26104

MEDIUM
Missing Authorization (CWE-862)
2026-02-25 secalert@redhat.com
Authentication Bypass Red Hat Enterprise Linux Udisks Suse Freedesktop
5.5
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-862
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

CVSS 5.5 (MEDIUM). Attack vector: Local. Complexity: Low. Privileges required: Low. User interaction: None. Exploitation no authentication required.
Exploit ScenarioDerived

An attacker without authentication could exploit this vulnerability to back up LUKS encryption headers without authorization.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Unprivileged users can extract LUKS encryption headers from the udisks daemon due to missing authorization checks on a privileged D-Bus method, allowing attackers to read sensitive cryptographic metadata and potentially compromise encrypted storage confidentiality. The vulnerability affects systems running vulnerable versions of udisks and requires local access to exploit. No patch is currently available.

Earlier versions of this analysis (1)
v1 Mar 12, 2026 - 21:55 CVSS 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. [CVSS 5.5 MEDIUM]

RemediationAI

Monitor vendor advisories for a patch.

Affects your stack

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Technical ContextAI · show details

Classified as CWE-862 (Missing Authorization). Affects Enterprise Linux. 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.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SUSE MEDIUM
Red Hat 5.5 MEDIUM

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch released
Apr 10, 2026 - 08:30 nvd
Patch available
CVE Published
Feb 25, 2026 - 11:16 nvd
MEDIUM 5.5

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

Organizations using A flaw should be aware of moderate risk from CVE-2026-26104, a missing authorization vulnerability rated CVSS 5.5. Attackers could gain access beyond their authorized level. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.0%
Top 99% exploitable
Data Quality
5 sources
Confidence: Medium
NVD CVE.org EPSS Vendor GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact
Low

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)CVE.org

cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:a:freedesktop:udisks:2.0.0:*:*:*:*:*:*:*

More in Udisks

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CVE-2018-17336 HIGH POC
7.8 Sep 22

UDisks 2.8.0 has a format string vulnerability in udisks_log in udiskslogging.c, allowing attackers to obtain sensitive

CVE-2021-3802 MEDIUM POC
4.2 Nov 29

A vulnerability found in udisks2. Rated medium severity (CVSS 4.2), this vulnerability is low attack complexity. Public

CVE-2026-26103 HIGH
7.1 Feb 25

Improper authorization in the udisks D-Bus API allows local unprivileged users to manipulate LUKS encryption headers on

CVE-2014-0004 MEDIUM
6.9 Mar 11

Stack-based buffer overflow in udisks before 1.0.5 and 2.x before 2.1.3 allows local users to cause a denial of service

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
openSUSE Tumbleweed Fixed
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Micro 5.3 Fixed
SUSE Linux Enterprise Micro 5.4 Fixed

References

Advisories & patches
ADVISORY https://access.redhat.com/security/cve/CVE-2026-26104 ADVISORY https://bugzilla.redhat.com/show_bug.cgi?id=2433717 ADVISORY https://vuldb.com/?id.347753 REF https://access.redhat.com/errata/RHSA-2026:3476 REF https://access.redhat.com/errata/RHSA-2026:5831 REF https://github.com/storaged-project/udisks/security/advisories/GHSA-fcvx-497g-6xmw

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