Privilege Escalation Vulnerability in udisks Storage Management Daemon by Red Hat
CVE-2026-26103

7.1HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Vendor
CVE Published:
25 February 2026

What is CVE-2026-26103?

A security flaw exists in the udisks storage management daemon, which provides a D-Bus API that lacks proper authorization checks. This vulnerability allows local unprivileged users to command the root-owned udisks daemon to overwrite LUKS encryption metadata on block devices. As a result, sensitive encryption keys may become invalid, and encrypted volumes could be rendered permanently inaccessible. Exploiting this vulnerability may lead to significant denial-of-service conditions due to irreversible data loss.

Affected Version(s)

Red Hat Enterprise Linux 10 0:2.10.90-6.el10_1.1

Red Hat Enterprise Linux 10.0 Extended Update Support 0:2.10.90-5.el10_0.2

References

https://access.redhat.com/errata/RHSA-2026:3476
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:5831
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-26103
vdb-entryx_refsource_REDHAT

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Asim Viladi Oglu Manizada for reporting this issue.
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