CVE-2026-9640
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.
How to fix
- canonical lxd5.0.7, 5.21.5, 6.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| canonical lxd | 4.12 ≤ v < 5.0.7, 5.21.0 ≤ v < 5.21.5, 6.0 ≤ v < 6.9 | 5.0.7, 5.21.5, 6.9 |
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