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.
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
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libudisks2 · almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | ALSA-2026:3476 | Mar 2, 2026 |
| libudisks2 · ol 10 | 0:2.10.90-6.0.1.el10_1.1 | ELSA-2026-3476 | Mar 2, 2026 |
| libudisks2-devel · almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | ALSA-2026:3476 | Mar 2, 2026 |
| libudisks2-devel · ol 10 | 0:2.10.90-6.0.1.el10_1.1 | ELSA-2026-3476 | Mar 2, 2026 |
| udisks2 · Debian 14 | 2.11.1-1 | DEBIAN-CVE-2026-26103 | Feb 25, 2026 |
| udisks2 · RHEL 10 | 2.10.90-5.el10_0.2 | RHSA-2026:5831 | Mar 12, 2026 |
| udisks2 · almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | ALSA-2026:3476 | Mar 2, 2026 |
| udisks2 · ol 10 | 0:2.10.90-6.0.1.el10_1.1 | ELSA-2026-3476 | Mar 2, 2026 |
| udisks2 · rocky 10 | 0:2.10.90-6.el10_1.1 | RLSA-2026:3476 | Mar 5, 2026 |
| udisks2-iscsi · almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | ALSA-2026:3476 | Mar 2, 2026 |
| udisks2-iscsi · ol 10 | 0:2.10.90-6.0.1.el10_1.1 | ELSA-2026-3476 | Mar 2, 2026 |
| udisks2-lsm · almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | ALSA-2026:3476 | Mar 2, 2026 |
| udisks2-lsm · ol 10 | 0:2.10.90-6.0.1.el10_1.1 | ELSA-2026-3476 | Mar 2, 2026 |
| udisks2-lvm2 · almalinux 10 | 2.10.90-6.el10_1.1.alma.1 | ALSA-2026:3476 | Mar 2, 2026 |
| udisks2-lvm2 · ol 10 | 0:2.10.90-6.0.1.el10_1.1 | ELSA-2026-3476 | Mar 2, 2026 |
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