# CVE-2026-26103: udisks2: A flaw was found in the udisks storage management daemon that exposes a privileged D-Bus API for restoring LUKS encry...

CVE-2026-26103 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-26103, released February 25, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-26103
- Priority: High
- CVSS: 7.1 (important)
- EPSS: 0.0008
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 25, 2026

## Description

A flaw was found in the udisks storage management daemon that exposes a privileged D-Bus API for restoring LUKS encryption headers without proper authorization checks. The issue allows a local unprivileged user to instruct the root-owned udisks daemon to overwrite encryption metadata on block devices. This can permanently invalidate encryption keys and render encrypted volumes inaccessible. Successful exploitation results in a denial-of-service condition through irreversible data loss.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libudisks2 almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | [ALSA-2026:3476](https://patchblox.com/security/data/fix/linux/alsa-2026-3476.md) | Mar 2, 2026 |
| Linux | libudisks2 ol 10 | 0:2.10.90-6.0.1.el10_1.1 | [ELSA-2026-3476](https://patchblox.com/security/data/fix/linux/elsa-2026-3476.md) | Mar 2, 2026 |
| Linux | libudisks2-devel almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | [ALSA-2026:3476](https://patchblox.com/security/data/fix/linux/alsa-2026-3476.md) | Mar 2, 2026 |
| Linux | libudisks2-devel ol 10 | 0:2.10.90-6.0.1.el10_1.1 | [ELSA-2026-3476](https://patchblox.com/security/data/fix/linux/elsa-2026-3476.md) | Mar 2, 2026 |
| Linux | udisks2 Debian 14 | 2.11.1-1 | [DEBIAN-CVE-2026-26103](https://patchblox.com/security/data/fix/linux/debian-cve-2026-26103.md) | Feb 25, 2026 |
| Linux | udisks2 RHEL 10 | 2.10.90-5.el10_0.2 | [RHSA-2026:5831](https://patchblox.com/security/data/fix/linux/rhsa-2026-5831.md) | Mar 12, 2026 |
| Linux | udisks2 almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | [ALSA-2026:3476](https://patchblox.com/security/data/fix/linux/alsa-2026-3476.md) | Mar 2, 2026 |
| Linux | udisks2 ol 10 | 0:2.10.90-6.0.1.el10_1.1 | [ELSA-2026-3476](https://patchblox.com/security/data/fix/linux/elsa-2026-3476.md) | Mar 2, 2026 |
| Linux | udisks2 rocky 10 | 0:2.10.90-6.el10_1.1 | [RLSA-2026:3476](https://patchblox.com/security/data/fix/linux/rlsa-2026-3476.md) | Mar 5, 2026 |
| Linux | udisks2-iscsi almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | [ALSA-2026:3476](https://patchblox.com/security/data/fix/linux/alsa-2026-3476.md) | Mar 2, 2026 |
| Linux | udisks2-iscsi ol 10 | 0:2.10.90-6.0.1.el10_1.1 | [ELSA-2026-3476](https://patchblox.com/security/data/fix/linux/elsa-2026-3476.md) | Mar 2, 2026 |
| Linux | udisks2-lsm almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | [ALSA-2026:3476](https://patchblox.com/security/data/fix/linux/alsa-2026-3476.md) | Mar 2, 2026 |
| Linux | udisks2-lsm ol 10 | 0:2.10.90-6.0.1.el10_1.1 | [ELSA-2026-3476](https://patchblox.com/security/data/fix/linux/elsa-2026-3476.md) | Mar 2, 2026 |
| Linux | udisks2-lvm2 almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | [ALSA-2026:3476](https://patchblox.com/security/data/fix/linux/alsa-2026-3476.md) | Mar 2, 2026 |
| Linux | udisks2-lvm2 ol 10 | 0:2.10.90-6.0.1.el10_1.1 | [ELSA-2026-3476](https://patchblox.com/security/data/fix/linux/elsa-2026-3476.md) | Mar 2, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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