CVE-2026-26104

Local LUKS header disclosure via unchecked HeaderBackup

Published Feb 25, 2026 · Updated Feb 25, 2026

Missing authorization in udisks2 on Red Hat Enterprise Linux 10 allows local users to export LUKS headers through D-Bus. The handle_header_backup method lets the root udisks daemon read and export a device header and keyslots without a polkit authorization check. A low-privileged local account can obtain metadata from otherwise inaccessible devices for offline password-cracking or cryptographic analysis.

CVSS severity5.5
Medium
EPSS probability0.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in udisks2 on Red Hat Enterprise Linux 10 allows local users to export LUKS headers through D-Bus. The handle_header_backup method lets the root udisks daemon read and export a device header and keyslots without a polkit authorization check. A low-privileged local account can obtain metadata from otherwise inaccessible devices for offline password-cracking or cryptographic analysis.

The record

CVE
CVE-2026-26104
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 10
Classifications
CWE-862, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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