Critical · published August 13, 2026
An authorization bypass vulnerability in LXD allows an authenticated user to bypass project-level disk and volume limits. Two related code paths fail to verify resource limits during volume operations: the storagePoolVolumeTypePostMove function omits the limits.AllowVolumeCreation check before moving a volume across projects, and volume snapshot restore operations skip the AllowVolumeUpdate check when the configuration is nil (Config == nil). An attacker can exploit these flaws to allocate storage resources that exceed the administrative limits configured for a project.
| Product | Versions | Fixed in |
|---|---|---|
| canonical/lxd | ≥ 5.0.0, < 5.0.8 | 5.0.8 |
| canonical/lxd | ≥ 5.1, < 5.21.6 | 5.21.6 |
| canonical/lxd | ≥ 6.0, < 6.10 | 6.10 |