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NVD / CVE Program· CNA redhat

CVE-2026-26104: Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.08% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: libudisks2 (AlmaLinux:10) 2.10.90-6.el10_1.1.alma.1; libudisks2-devel (AlmaLinux:10) 2.10.90-6.el10_1.1.alma.1; udisks2 (AlmaLinux:10) 2.10.90-6.el10_1.1.alma.1.

Low priority for now. Upgrade to libudisks2 (AlmaLinux:10) 2.10.90-6.el10_1.1.alma.1; libudisks2-devel (AlmaLinux:10) 2.10.90-6.el10_1.1.alma.1; udisks2 (AlmaLinux:10) 2.10.90-6.el10_1.1.alma.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Feb 25, 2026
Updated
Nov 5, 2026
EPSS
0.0% · 0th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.0%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
5.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Follow CVE-2026-26104

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
redhatenterprise linux
freedesktopudisks

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 10

    • 0:2.10.90-6.el10_1.1 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

    • 0:2.10.90-5.el10_0.2 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsunknown

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • freedesktop udisks2.0.0
  • redhat enterprise linux10.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10libudisks2before 2.10.90-6.el10_1.1.alma.12.10.90-6.el10_1.1.alma.1
AlmaLinux:10libudisks2-develbefore 2.10.90-6.el10_1.1.alma.12.10.90-6.el10_1.1.alma.1
AlmaLinux:10udisks2before 2.10.90-6.el10_1.1.alma.12.10.90-6.el10_1.1.alma.1
AlmaLinux:10udisks2-iscsibefore 2.10.90-6.el10_1.1.alma.12.10.90-6.el10_1.1.alma.1
AlmaLinux:10udisks2-lsmbefore 2.10.90-6.el10_1.1.alma.12.10.90-6.el10_1.1.alma.1
AlmaLinux:10udisks2-lvm2before 2.10.90-6.el10_1.1.alma.12.10.90-6.el10_1.1.alma.1
Debian:14udisks2before 2.11.1-12.11.1-1
openSUSE:Tumbleweedudisks2before 2.11.0-2.12.11.0-2.1
Red Hat:enterprise_linux_eus:10.0libudisks2before 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0libudisks2-debuginfobefore 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0libudisks2-develbefore 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0udisks2before 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0udisks2-debuginfobefore 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0udisks2-debugsourcebefore 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0udisks2-iscsibefore 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0udisks2-iscsi-debuginfobefore 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0udisks2-lsmbefore 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0udisks2-lsm-debuginfobefore 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0udisks2-lvm2before 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux_eus:10.0udisks2-lvm2-debuginfobefore 0:2.10.90-5.el10_0.20:2.10.90-5.el10_0.2
Red Hat:enterprise_linux:10.1libudisks2before 0:2.10.90-6.el10_1.10:2.10.90-6.el10_1.1
Red Hat:enterprise_linux:10.1libudisks2-debuginfobefore 0:2.10.90-6.el10_1.10:2.10.90-6.el10_1.1
Red Hat:enterprise_linux:10.1libudisks2-develbefore 0:2.10.90-6.el10_1.10:2.10.90-6.el10_1.1
Red Hat:enterprise_linux:10.1udisks2before 0:2.10.90-6.el10_1.10:2.10.90-6.el10_1.1

+9

Same product

redhat: all records

Other highest-scoring records for the same primary product.

  • CVE-2015-3246libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd…KEV
    62This week
  • CVE-2023-50387Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of…
    60This week
  • CVE-2017-5456A mechanism to bypass file system access protections in the sandbox using the file system request constructor through an IPC message.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2024-45620Sep 3, 2024 · Libopensc: incorrect handling of the length of buffers or files in pkcs15init
    15Monitor
  • ← EarlierCVE-2026-26103Feb 25, 2026 · Udisks: missing authorization check allows unprivileged users to restore luks headers via udisks d-bus api
    28Monitor
  • Later →CVE-2026-12549Jun 22, 2026 · Libsoup: incomplete fix for cve-2026-2443: range suffix overflow in libsoup soupserver
    19Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:libudisks22.10.90-6.el10_1.1.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libudisks2-devel2.10.90-6.el10_1.1.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:udisks22.10.90-6.el10_1.1.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:udisks2-iscsi2.10.90-6.el10_1.1.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:udisks2-lsm2.10.90-6.el10_1.1.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:udisks2-lvm22.10.90-6.el10_1.1.alma.1 · AlmaLinux:10Package registry (OSV)
debian:udisks22.11.1-1 · Debian:14Package registry (OSV)
opensuse:udisks22.11.0-2.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:libudisks20:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:libudisks2-debuginfo0:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:libudisks2-devel0:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:udisks20:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:udisks2-debuginfo0:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:udisks2-debugsource0:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:udisks2-iscsi0:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:udisks2-iscsi-debuginfo0:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:udisks2-lsm0:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:udisks2-lsm-debuginfo0:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:udisks2-lvm20:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
red hat:udisks2-lvm2-debuginfo0:2.10.90-6.el10_1.1 · Red Hat:enterprise_linux:10.1Package registry (OSV)
rocky linux:udisks20:2.10.90-6.el10_1.1 · Rocky Linux:10Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-261030 days apartUdisks: missing authorization check allows unprivileged users to restore luks headers via udisks d-bus api
    28Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-862 · Missing Authorization

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records