CVE-2026-63299: canonical lxd

CVSS 9.9 (critical) · published 2026-08-12

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.

Affected products (NVD): canonical lxd

Fixed in (NVD): 5.0.8, 5.21.6, 6.10

Weakness: CWE-770

Source: NVD CVE-2026-63299

References

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