PT-2026-21896 · U-Disks · Udisks

Osidb Bzimport · Published 2026-02-25 · Updated 2026-03-02 · CVE-2026-26103

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions udisks (affected versions not specified)

Description A flaw exists in the udisks storage management daemon related to authorization checks for restoring LUKS encryption headers via a privileged D-Bus API. An unprivileged local user can instruct the root-owned udisks daemon to overwrite encryption metadata on block devices. This can permanently invalidate encryption keys and render encrypted volumes inaccessible, resulting in a denial-of-service condition through irreversible data loss. The issue involves manipulation of LUKS encryption headers.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

LPE

DoS

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

ALSA-2026:3476

CVE-2026-26103

GHSA-C75H-PHF8-CCJM

OPENSUSE-SU-2026:10273-1

RHSA-2026:3476

RHSA-2026:5831

Affected Products

Udisks

References · 23

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-26103 · Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2433719 · Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-26103 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10273-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-26103 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:3476 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2026:3476 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-26103 · Security Note
• https://errata.almalinux.org/10/ALSA-2026-3476.html · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:5831 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-26103 · Vendor Advisory
• https://github.com/storaged-project/udisks/security/advisories/GHSA-c75h-phf8-ccjm · Note
• https://suse.com/security/cve/CVE-2026-26104 · Note
• https://twitter.com/cracbot/status/2028425251194089642 · Twitter Post
• https://t.me/cveNotify/153139 · Telegram Post