CVE-2026-9640LXD Snapshot Import Privilege Escalation Vulnerability

Description

A privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.. An authenticated project operator in a restricted multi-tenant environment can bypass policy restrictions by importing a maliciously crafted instance backup containing restricted configuration keys within a snapshot. When the snapshot is restored, these restricted keys are applied to the live instance without policy validation. Starting the modified instance grants the operator unauthorized host root access.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552 vdb-entryvendor-advisoryExploit
• https://github.com/canonical/lxd/pull/18301 patchIssue TrackingPatch
• https://github.com/canonical/lxd/pull/18303 patchIssue TrackingPatch
• https://github.com/canonical/lxd/pull/18304 patchIssue TrackingPatch