CVE-2026-63300
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_create_instances permissions on a restricted project to bypass project-level security restrictions. When migrating an instance between projects, LXD fails to validate the instance's configuration against the target project's enforced restrictions (such as restricted.containers.lowlevel, restricted.devices.*, and restricted.networks.access). An attacker can exploit this by creating a disallowed or high-privilege instance in an unrestricted project and subsequently moving it into the restricted project.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Canonical | LXD | 5.0.0 < 5.0.8 | affected |
| Canonical | LXD | 5.21.0 < 5.21.6 | affected |
| Canonical | LXD | 6.0 < 6.10 | affected |
Weaknesses
- CWE-862: CWE-862 Missing Authorization
References
- https://github.com/canonical/lxd/security/advisories/GHSA-5g5r-wh97-qcq2
- https://github.com/canonical/lxd/pull/18651
- https://github.com/canonical/lxd/pull/18605
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